Communication Module DVPSCM12/52-SL
DVP-PLC Operation Manual
13
0: Enabling the function; 1: Disabling the function
CR#49~50: Selecting the “writing words through COM2” checkbox
[Description]
Select the “writing words through COM1” checkbox. The SCM module can write at most 32 groups of data
(No.1~No.32).
CR#49: No.16~No.1; CR#50: No.32~No.17
0: Enabling the function; 1: Disabling the function
CR#116: Sending the MODBUS command
[Description]
The SCM module sends the MODBUS command.
1: Enabling the sending.
After the sending of the MODBUS command is complete, CR#116 is reset to 0.
CR#117: Processing status of the MODBUS command
[Description]
0: Not yet received; 1: Processing; 2: Received; 3: Reception failure
CR#118: Destination of the MODBUS command
[Description]
Designate the sending port of the SCM module. 1: COM1; 2: COM2
CR#119：Length of the MODBUS command
[Description]
The length of the MODBUS command which is sent (in a hexadecimal value) depends on the start content
of CR120.
CR#120~249：Contents of the MODBUS command
[Description]
The contents of the MODBUS command which is sent (in a hexadecimal value)
4.3 Right-side Module Numbers
After the SCM module is installed, the related functions of the I/O module are controlled by the PLC
program. The PLC provides two instructions (FROM and TO) to read/write the data from/into the control
register of the special module.
Left-side module numbers: Each left-side/right-side module connecting to the MPU of the PLC has a
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