Modbus

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September 16, 2025

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Modbus Configuration

This page displays the current Modbus configuration for the Cassandra system, including coils and registers organized by component groups.

Overview
Coils
Registers
Function Types
Enum and Flag Values
References

Overview

The Modbus configuration defines all the coils and registers available in the Cassandra system. Each entry shows the address, name, component, and function type. For registers with enumerated values or flags, the possible values are displayed with their meanings.

Coils

The following table shows all configured coils grouped by their components:

AmperageBudgetManager

FC	Address	Name	Component	ID
1/5	4096	Enabled	AmperageBudgetManager	850

Cas-Master-Lower-Cell-HDPE

FC	Address	Name	Component	ID
1/5	200	Enabled	Cas-Master-Lower-Cell-HDPE	910

Default Pressure Profile

FC	Address	Name	Component	ID
1/5	300	Enabled	Default Pressure Profile	920

Feedback3C

FC	Address	Name	Component	ID
1/5	80	Enabled	Feedback3C	701
1/5	81	LED 0	Feedback3C	701
1/5	82	LED 1	Feedback3C	701
1/5	83	LED 2	Feedback3C	701

FeedbackBuzzer

FC	Address	Name	Component	ID
1/5	56	Enabled	FeedbackBuzzer	730
1/5	57	Buzzer State	FeedbackBuzzer	730

Joystick

FC	Address	Name	Component	ID
1/5	48	Enabled	Joystick	500

Loadcell[20]

FC	Address	Name	Component	ID
1/5	364	Enabled	RS485	801

Loadcell[21]

FC	Address	Name	Component	ID
1/5	370	Enabled	RS485	801

OmronE5[10]

FC	Address	Name	Component	ID
1/5	1192	Run/Stop Coil	RS485	801
1/5	1198	Enabled	RS485	801
1/5	1199	Comms Write	RS485	801

OmronE5[11]

FC	Address	Name	Component	ID
1/5	1210	Run/Stop Coil	RS485	801
1/5	1216	Enabled	RS485	801
1/5	1217	Comms Write	RS485	801

OmronE5[12]

FC	Address	Name	Component	ID
1/5	1228	Run/Stop Coil	RS485	801
1/5	1234	Enabled	RS485	801
1/5	1235	Comms Write	RS485	801

OmronE5[13]

FC	Address	Name	Component	ID
1/5	1246	Run/Stop Coil	RS485	801
1/5	1252	Enabled	RS485	801
1/5	1253	Comms Write	RS485	801

OmronE5[14]

FC	Address	Name	Component	ID
1/5	1264	Run/Stop Coil	RS485	801
1/5	1270	Enabled	RS485	801
1/5	1271	Comms Write	RS485	801

OmronE5[15]

FC	Address	Name	Component	ID
1/5	1282	Run/Stop Coil	RS485	801
1/5	1288	Enabled	RS485	801
1/5	1289	Comms Write	RS485	801

OmronE5[16]

FC	Address	Name	Component	ID
1/5	1300	Run/Stop Coil	RS485	801
1/5	1306	Enabled	RS485	801
1/5	1307	Comms Write	RS485	801

OmronE5[17]

FC	Address	Name	Component	ID
1/5	1318	Run/Stop Coil	RS485	801
1/5	1324	Enabled	RS485	801
1/5	1325	Comms Write	RS485	801

OperatorSwitch

FC	Address	Name	Component	ID
1/5	52	Enabled	OperatorSwitch	1002
1/5	54	StopCoil	OperatorSwitch	1002
1/5	55	CycleCoil	OperatorSwitch	1002

PHApp

FC	Address	Name	Component	ID
1/5	4	Is Slave	PHApp	1
1/5	5	All Omron Stop	PHApp	1
1/5	6	All Omron Com Write	PHApp	1

Post-Die-Pressing

FC	Address	Name	Component	ID
1/5	207	Enabled	Post-Die-Pressing	911

PressCylinder

FC	Address	Name	Component	ID
1/5	700	Enabled	PressCylinder	760
1/5	709	Interlocked	PressCylinder	760

SampleSignalPlot_0

FC	Address	Name	Component	ID
1/5	500	Enabled	Default Pressure Profile	920

Settings

FC	Address	Name	Component	ID
1/5	800	Enabled	Settings	11
1/5	801	ALWAYS_WARMUP	Settings	11
1/5	802	ALWAYS_STOP_PIDS_ON_PROFILE_FINISHED	Settings	11
1/5	806	SEQUENTIAL_HEATING_EXCLUSIVE	Settings	11

ShortPlot_70s

FC	Address	Name	Component	ID
1/5	507	Enabled	ShortPlot_70s	921

SignalPlot_922_Slot_2

FC	Address	Name	Component	ID
1/5	514	Enabled	SignalPlot_922_Slot_2	922

SignalPlot_923_Slot_3

FC	Address	Name	Component	ID
1/5	521	Enabled	SignalPlot_923_Slot_3	923

Solenoid-310

FC	Address	Name	Component	ID
1/5	40	Enabled	Solenoid-310	310
1/5	41	State	Solenoid-310	310

Solenoid-311

FC	Address	Name	Component	ID
1/5	44	Enabled	Solenoid-311	311
1/5	45	State	Solenoid-311	311

TempProfile_912_Slot_2

FC	Address	Name	Component	ID
1/5	214	Enabled	TempProfile_912_Slot_2	912

TempProfile_913_Slot_3

FC	Address	Name	Component	ID
1/5	221	Enabled	TempProfile_913_Slot_3	913

Registers

The following table shows all configured registers grouped by their components:

AmperageBudgetManager

FC	Address	Name	Component
3	4097	Info	AmperageBudgetManager
6	4098	MinTime	AmperageBudgetManager
6	4099	MaxTime	AmperageBudgetManager
6	4100	MaxSim	AmperageBudgetManager
6	4101	Offset	AmperageBudgetManager
6	4102	StartIndex	AmperageBudgetManager
6	4103	EndIndex	AmperageBudgetManager
6	4104	Mode	AmperageBudgetManager
6	4105	MaxTimeOscillating	AmperageBudgetManager
6	4106	PostHeatupMode	AmperageBudgetManager
6	4107	OpFlags	AmperageBudgetManager

Cas-Master-Lower-Cell-HDPE

FC	Address	Name	Component
3	201	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	Cas-Master-Lower-Cell-HDPE
3	202	CurrentValue	Cas-Master-Lower-Cell-HDPE
3	203	Duration	Cas-Master-Lower-Cell-HDPE
3	204	Elapsed	Cas-Master-Lower-Cell-HDPE
3	205	Remaining	Cas-Master-Lower-Cell-HDPE
6	206	Command	Cas-Master-Lower-Cell-HDPE

Default Pressure Profile

FC	Address	Name	Component
3	301	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	Default Pressure Profile
3	302	CurrentValue	Default Pressure Profile
3	303	Duration	Default Pressure Profile
3	304	Elapsed	Default Pressure Profile
3	305	Remaining	Default Pressure Profile
6	306	Command	Default Pressure Profile

Feedback3C

FC	Address	Name	Component
6	84	LED Freq 0	Feedback3C
6	85	LED Freq 1	Feedback3C
6	86	LED Freq 2	Feedback3C
6	87	Command	Feedback3C
6	88	Mode	Feedback3C

FeedbackBuzzer

FC	Address	Name	Component	Description
6	58	Buzzer Mode	FeedbackBuzzer

Joystick

FC	Address	Name	Component
3	49	Position	Joystick
6	50	Mode	Joystick
6	51	Override	Joystick

Loadcell[20]

FC	Address	Name	Component
3	361	PV	RS485
3	362	Voltage	RS485
3	363	Zero Voltage	RS485
6	365	Mode	RS485
6	366	Command	RS485

Loadcell[21]

FC	Address	Name	Component
3	367	PV	RS485
3	368	Voltage	RS485
3	369	Zero Voltage	RS485
6	371	Mode	RS485
6	372	Command	RS485

OmronE5[10]

FC	Address	Name	Component
3	1181	PV	RS485
3	1182	Status High	RS485
3	1183	Status Low	RS485
3	1185	SP	RS485
6	1191	SP CMD	RS485
6	1193	Execute Command	RS485
3	1194	Heating Status	RS485
3	1196	Heatup Status	RS485

OmronE5[11]

FC	Address	Name	Component
3	1199	PV	RS485
3	1200	Status High	RS485
3	1201	Status Low	RS485
3	1203	SP	RS485
6	1209	SP CMD	RS485
6	1211	Execute Command	RS485
3	1212	Heating Status	RS485
3	1214	Heatup Status	RS485

OmronE5[12]

FC	Address	Name	Component
3	1217	PV	RS485
3	1218	Status High	RS485
3	1219	Status Low	RS485
3	1221	SP	RS485
6	1227	SP CMD	RS485
6	1229	Execute Command	RS485
3	1230	Heating Status	RS485
3	1232	Heatup Status	RS485

OmronE5[13]

FC	Address	Name	Component
3	1235	PV	RS485
3	1236	Status High	RS485
3	1237	Status Low	RS485
3	1239	SP	RS485
6	1245	SP CMD	RS485
6	1247	Execute Command	RS485
3	1248	Heating Status	RS485
3	1250	Heatup Status	RS485

OmronE5[14]

FC	Address	Name	Component
3	1253	PV	RS485
3	1254	Status High	RS485
3	1255	Status Low	RS485
3	1257	SP	RS485
6	1263	SP CMD	RS485
6	1265	Execute Command	RS485
3	1266	Heating Status	RS485
3	1268	Heatup Status	RS485

OmronE5[15]

FC	Address	Name	Component
3	1271	PV	RS485
3	1272	Status High	RS485
3	1273	Status Low	RS485
3	1275	SP	RS485
6	1281	SP CMD	RS485
6	1283	Execute Command	RS485
3	1284	Heating Status	RS485
3	1286	Heatup Status	RS485

OmronE5[16]

FC	Address	Name	Component
3	1289	PV	RS485
3	1290	Status High	RS485
3	1291	Status Low	RS485
3	1293	SP	RS485
6	1299	SP CMD	RS485
6	1301	Execute Command	RS485
3	1302	Heating Status	RS485
3	1304	Heatup Status	RS485

OmronE5[17]

FC	Address	Name	Component
3	1307	PV	RS485
3	1308	Status High	RS485
3	1309	Status Low	RS485
3	1311	SP	RS485
6	1317	SP CMD	RS485
6	1319	Execute Command	RS485
3	1320	Heating Status	RS485
3	1322	Heatup Status	RS485

OperatorSwitch

FC	Address	Name	Component	Description
3	53	State	OperatorSwitch

PHApp

FC	Address	Name	Component	Description
3	0	System Error	PHApp
3	1	App State	PHApp
3	2	Sub State 0	PHApp
3	3	Sub State 1	PHApp
3	8	Echo Test	PHApp
3	10	Free Heap	PHApp
3	11	Max Free Block)	PHApp
3	12	Heap Fragmentationn	PHApp	Heap Size
6	100	Reset Controller	PHApp

Post-Die-Pressing

FC	Address	Name	Component
3	208	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	Post-Die-Pressing
3	209	CurrentValue	Post-Die-Pressing
3	210	Duration	Post-Die-Pressing
3	211	Elapsed	Post-Die-Pressing
3	212	Remaining	Post-Die-Pressing
6	213	Command	Post-Die-Pressing

PressCylinder

FC	Address	Name	Component
3	701	PV 0	PressCylinder
3	702	PV 1	PressCylinder
6	703	Target SP	PressCylinder
6	704	Mode 0 NONE 1 MANUAL 2 AUTO 3 MANUAL_MULTI 4 AUTO_MULTI 5 AUTO_MULTI_BALANCED 6 REMOTE	PressCylinder
3	705	State 0 IDLE 1 MAXLOAD 2 ERROR	PressCylinder
6	706	Cmd 1 INFO 2 RESET	PressCylinder
3	707	Error 0 OK 1 MINLOAD 2 OVERLOAD 3 BALANCE_MAX_DIFF 4 LOADCELL 5 MAX_TIME 6 STALLED 7 AUTO_TIMEOUT	PressCylinder
6	708	CFlags 1 MINLOAD 2 MAX_TIME 4 STALLED 8 BALANCE 16 LOADCELL 32 MULTI_TIMEOUT	PressCylinder

SampleSignalPlot_0

FC	Address	Name	Component
3	501	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	Default Pressure Profile
3	502	CurrentValue	Default Pressure Profile
3	503	Duration	Default Pressure Profile
3	504	Elapsed	Default Pressure Profile
3	505	Remaining	Default Pressure Profile
6	506	Command	Default Pressure Profile

Settings

FC	Address	Name	Component
6	803	MAX_TEMPERATURE	Settings
6	804	MIN_TEMPERATURE	Settings
6	805	SP_DEADBAND	Settings
6	807	LOADCELL_SLAVE_ID_0	Settings
6	808	LOADCELL_SLAVE_ID_1	Settings
6	809	SOLENOID_0_MB_ADDR	Settings
6	810	SOLENOID_1_MB_ADDR	Settings

ShortPlot_70s

FC	Address	Name	Component
3	508	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	ShortPlot_70s
3	509	CurrentValue	ShortPlot_70s
3	510	Duration	ShortPlot_70s
3	511	Elapsed	ShortPlot_70s
3	512	Remaining	ShortPlot_70s
6	513	Command	ShortPlot_70s

SignalPlot_922_Slot_2

FC	Address	Name	Component
3	515	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	SignalPlot_922_Slot_2
3	516	CurrentValue	SignalPlot_922_Slot_2
3	517	Duration	SignalPlot_922_Slot_2
3	518	Elapsed	SignalPlot_922_Slot_2
3	519	Remaining	SignalPlot_922_Slot_2
6	520	Command	SignalPlot_922_Slot_2

SignalPlot_923_Slot_3

FC	Address	Name	Component
3	522	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	SignalPlot_923_Slot_3
3	523	CurrentValue	SignalPlot_923_Slot_3
3	524	Duration	SignalPlot_923_Slot_3
3	525	Elapsed	SignalPlot_923_Slot_3
3	526	Remaining	SignalPlot_923_Slot_3
6	527	Command	SignalPlot_923_Slot_3

TempProfile_912_Slot_2

FC	Address	Name	Component
3	215	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	TempProfile_912_Slot_2
3	216	CurrentValue	TempProfile_912_Slot_2
3	217	Duration	TempProfile_912_Slot_2
3	218	Elapsed	TempProfile_912_Slot_2
3	219	Remaining	TempProfile_912_Slot_2
6	220	Command	TempProfile_912_Slot_2

TempProfile_913_Slot_3

FC	Address	Name	Component
3	222	Status 0 IDLE 1 INITIALIZING 2 RUNNING 3 PAUSED 4 STOPPED 5 FINISHED	TempProfile_913_Slot_3
3	223	CurrentValue	TempProfile_913_Slot_3
3	224	Duration	TempProfile_913_Slot_3
3	225	Elapsed	TempProfile_913_Slot_3
3	226	Remaining	TempProfile_913_Slot_3
6	227	Command	TempProfile_913_Slot_3

Function Types

The tables display different Modbus function types with color-coded badges:

🔵 Holding Registers (FC3/FC6/FC16): Blue badges - for read/write data storage
🟢 Input Registers (FC4): Green badges - for read-only sensor data
🟠 Coils (FC1/FC5/FC15): Orange badges - for binary outputs and control
🟣 Discrete Inputs (FC2): Purple badges - for binary inputs and status

Enum and Flag Values

For registers with enumerated values or flags, the meanings are displayed below the register name:

Enums: Show possible states (e.g., Status: IDLE, RUNNING, STOPPED)
Flags: Show bit flags that can be combined (e.g., Error flags, Control flags)

Each enum or flag value shows both the numeric value and its human-readable meaning.

References

Official Documentation

Modbus Organization - The official Modbus organization website with protocol specifications and standards
Modbus TCP Toolkit - Official toolkit with documentation, diagnostic tools, and sample code for Modbus TCP/IP development
Modbus Application Protocol Specification - The official protocol specification document (PDF)

Educational Articles

Modbus Protocol Tutorial - Comprehensive tutorial covering Modbus RTU, ASCII, and TCP protocols
Modbus Tools and Applications Guide - Detailed article by Chipkin Automation Systems about Modbus tools and applications
Understanding Modbus Function Codes - Detailed explanation of Modbus function codes and their usage

Software Tools

Commercial Tools

Modbus Poll - Professional Modbus master simulator for testing and debugging slave devices
Modbus Slave - Simulator for up to 32 slave devices in separate windows
ModScan - Diagnostic tool for testing and debugging Modbus slave devices
ModSim - Modbus slave simulator for testing master applications

Free and Open Source Tools

CAS Modbus Scanner - Free utility to retrieve registers from Modbus devices
SCADACore Modbus Tools - Free tools for analyzing and debugging Modbus devices
ModbusTools (GitHub) - Cross-platform open-source Modbus simulator with GUI support
QModBus - Free Qt-based Modbus master application
libmodbus - Free software library to send/receive data according to the Modbus protocol

Online Tools

Modbus CRC Calculator - Online tool for calculating Modbus CRC checksums
Modbus RTU Frame Calculator - Online calculator for Modbus RTU frame structure

Development Libraries

pymodbus - Python Modbus library for client and server implementations
node-modbus - Node.js implementation of Modbus TCP and RTU
modbus-tk - Python toolkit for building Modbus applications
jamod - Java implementation of the Modbus protocol

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Modbus Configuration

Table of Contents

Overview

Coils

AmperageBudgetManager

Cas-Master-Lower-Cell-HDPE

Default Pressure Profile

Feedback3C

FeedbackBuzzer

Joystick

Loadcell[20]

Loadcell[21]

OmronE5[10]

OmronE5[11]

OmronE5[12]

OmronE5[13]

OmronE5[14]

OmronE5[15]

OmronE5[16]

OmronE5[17]

OperatorSwitch

PHApp

Post-Die-Pressing

PressCylinder

SampleSignalPlot_0

Settings

ShortPlot_70s

SignalPlot_922_Slot_2

SignalPlot_923_Slot_3

Solenoid-310

Solenoid-311

TempProfile_912_Slot_2

TempProfile_913_Slot_3

Registers

AmperageBudgetManager

Cas-Master-Lower-Cell-HDPE

Default Pressure Profile

Feedback3C

FeedbackBuzzer

Joystick

Loadcell[20]

Loadcell[21]

OmronE5[10]

OmronE5[11]

OmronE5[12]

OmronE5[13]

OmronE5[14]

OmronE5[15]

OmronE5[16]

OmronE5[17]

OperatorSwitch

PHApp

Post-Die-Pressing

PressCylinder

SampleSignalPlot_0

Settings

ShortPlot_70s

SignalPlot_922_Slot_2

SignalPlot_923_Slot_3

TempProfile_912_Slot_2

TempProfile_913_Slot_3

Function Types

Enum and Flag Values

References

Official Documentation

Educational Articles

Software Tools

Commercial Tools

Free and Open Source Tools

Online Tools

Development Libraries

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