Communication Via Modbus Rtu; Controlplex ® Controller Model; Error With Faulty Population; Error Device Addressing - E-T-A ControlPlex EM12D-TMB Instruction Manual

6. COMMUNICATION VIA MODBUS RTU

6.1 ControlPlex ® Controller Model
The EM12D-TMB has an internal ELBus ® interface enabling the communication with the electronic circuit protector
REX12D and REX22D. Up to 16 channels of the REX12D and REX22D electronic circuit protectors (single chan-
neled, multi-channeled or a mixed population) can be connected to the supply module.
Figure 8: EM12D-TMB with 16 channels

6.1.1 Error with Faulty Population

If a double channel device is connected as channel 16/17, the control unit will receive the information that a device
is available at channel 16.
When reading out the Cominfo of the circuit protector, received the message that the circuit protector has wrong
parameters.
The channels cannot be operated (cannot be switched on).

6.1.2 Error Device Addressing

Due to mechanical problems, there may be addressing errors.
The LED on EM12D-TMB is permanently lighted orange.
Possible causes are deformed or missing contacts in the connector arm.
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