Modbus Register Mapping Presentation

Introduction

The register mapping includes:

oAttached TM3/TM2 expansion IO modules input register values

oAttached TM3/TM2 expansion IO modules output register values

oAttached TM3/TM2 expansion IO modules configuration and status

Overview

The Manufacturer Zone is defined by Registers 0 - 1115.

The following table shows register mapping for the TM3 Modbus Serial Line bus coupler :

Functions	Registers	Description
Subset of Module Input Registers	0	Not used
Subset of Module Input Registers	1 - 99	Input for module NOTE: 1 - 99 is Mirror of 3001 - 3099 ⁽¹⁾
Subset of Module Output Registers	100	Not used
Subset of Module Output Registers	101 - 199	Output for module NOTE: 101 - 199 is Mirror of 3501 - 3599⁽¹⁾
Diagnostics/Status Registers	900	Bus coupler diagnostics
	901	IO module error Extend to maximum 14 modules
	902 - 929	Reserved
	930 - 931	IO module status
	932	System state
	990 - 993	Serial line communication diagnostics
Managing TM3 Configuration Behavior Registers	1000 - 1008	TM3 configuration action control
Managing Serial Line Connection Registers	1050 - 1054	Serial line communication configuration
Modules Description on IO Bus	1100 - 1115	Product code/firmware version and module ID code
(1) Access to those registers returns an error when System State (register 932) is not 4 (TM3 controlled by Modbus SL IOScanner). The values of registers 3001…3499, 3501…3999, 13001…13999 are valid only when the register 931 is 0 (Bus status OK, All module status OK).

The attributes in the table below define the access rights of a particular object:

Attribute	Description
RO	Read Only access.
RW	Read and Write access.

The following zones support the TM3BCSL Modbus data access requirements:

Zone	Registers	Access	Function
Bus Coupler Zone	2500 - 2999	RO	Bus coupler status and configuration
IO Modules Zone	3000 - 3499	RO	Full set of input registers for I/O modules attached to bus coupler ⁽¹⁾
	3500 - 3999	RW	Full set of output registers for I/O modules attached to bus coupler ⁽¹⁾
	4000 - 6999	RW	Configuration of all attached modules
	13000 - 13999	RO	Mirrored IO data to provide access to HMI device
(1) Access to those registers returns an error when System State (register 932) is not 4 (TM3 controlled by Modbus SL IOScanner

The following table shows the sub-function mapping of the TM3BCSL Modbus:

Functions	Registers	Description
Bus Coupler Status and Configuration	2500 - 2627	-
Full set of IO Modules Inputs Data Registers	3000	Not used
Full set of IO Modules Inputs Data Registers	3001 - 3499	Input values
Full set of IO Modules Outputs Data Registers	3500	Not used
Full set of IO Modules Outputs Data Registers	3501 - 3999	Output values
All attached Modules Configuration	4000 - 6799	IO Module Configuration for 1st to 14th module
Full set of IO Modules Inputs Data Registers (RO) for HMI device	13000	Not used
	13001 - 13499	Input values
Full set of IO Modules Outputs Data Registers (RO) for HMI device	13500	Not used
	13501 - 13999	Output values