Preconditions for the Use of the ACS / DCS Drives Communication via MODBUS RTU Library

The library is released for the following products:

CPUs:	AC500 and AC500-eCo
Fieldbus:	MODBUS RTU (Serial MODBUS)
Drives:	ACS800, ACSM1, ACS350, ACS355, ACS310, ACS550, ACH550, ACQ810, ACS850, ACS880, ACS800, DCS800, DCS550
Generic Devices:	No specific limit except that they can work with the MODBUS function codes defined in function block COM_MOD_MAST: COM_MOD_MAST
MODBUS RTU configuration:	Prior to the use of the Function Blocks a Communication Module “COMx_Modbus” has to be configured accordingly using Automation Builder, either at “Interfaces” or at “CM574-RS” module.
ACS3XX_COM_MOD_RTU, ACS_COM_MOD_RTU, ACS_COM_MOD_RTU_ENHANCED:	MODBUS communication tested for connection of 7 drives in total. Connection of more drives depends on the performance of used CPU and communication settings. The communication Function Blocks are designed to be used for one specific drive at runtime. So it´s not recommanded to change the COM or SLAVE inputs of the blocks while the program is running.
ACS_COM_MOD_RTU_GEN:	MODBUS communication for generic devices. The communication performance depends on performance of used CPU and communication settings. The communication Function Block is designed to be used for one specific slave device at runtime. So it´s not recommanded to change the COM or SLAVE inputs of the block while the program is running.

Note

The Function Blocks contained in the library can only be executed in RUN mode of the PLC, but not in simulation mode.

The blocks can only be used in combination with the ACSDrivesBase_AC500_V20 Library.