Toshiba T2 Series user manual Overview

1. Overview

The Modbus module (ML11) is used to connect T2E, T2N, or EX100 PLCs to a Modbus Master. The addition of the EX10-MML11 (MODBUS Module) allows the T2E, T2N or EX100 PLC to communicate via standard MODBUS RTU protocol. This allows quick and easy access to the PLC registers by a standard MODBUS Master.

Using the ML11 Modbus module any Modbus Master can read the status of registers in the PLC and write to registers in the PLC. This allows the Modbus Master to know the status of inputs to the PLC (both digital and analog) and to control the outputs of the PLC (also both digital and analog).

The ML11 Modbus module cannot be a Modbus master, only a modbus slave. It has one RS485 port for connection to the Modbus master. The preferred location of the EX10-MML11 is next to the CPU. However, the module may be located in any slot to the right of the CPU.

The CPU module can be any of the following:

EX10-MPU11	EX100 CPU, now obsolete
EX10-MPU12A	EX100 CPU, now obsolete
TPU215—S	T2 CPU now obsolete
TPU224--S	T2 CPU, now obsolete
TPU234E-S	T2E CPU (replaces all obsolete CPUs)
TPU215N-S	T2N CPU, basic
TPU235N-S	T2N CPU, with Ethernet
TPU245N-S	T2N CPU, with Ethernet and Tosline S20

The ML11 Modbus module is also used to connect a T2 or EX100 PLC into the Toshiba ECBUS. The ECBUS allows the PLCs to share data with Toshiba’s EC300 series loop controllers. The ECBUS is a LAN (local area network) which allows multiple EC300s and T2/EX100 PLCs to share data. For more information on the ECBUS, please refer to ECBUS Transmission Interface Manual, see Additional References.

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