YASKAWA VIPA SPEED7 - FB 73 - RTU_MB_SLAVE - Modbus RTU Slave

3. Set M101.0 in the CPU to TRUE.
ð
The Modbus request is sent and it is waited for a response.
If M101.0 is automatically reset, the job was finished without errors and the read
data are stored in the CPU starting from bit memory byte 200. MW104 returns
7004h and indicates waiting for a new job.
If M101.0 is not automatically reset and MW104 returns non-zero, an error has
occurred. The cause of error can be read by the code of MW104 (e.g. MW104 =
8382h when the start address 2000 in the server is not available). MW102
returns 7004h and indicates waiting for a new job.
9.2.2 FB 73 - RTU_MB_SLAVE - Modbus RTU slave
9.2.2.1 Description
This function block allows the operation of the internal serial RS485 interface of a
SPEED7 CPU from VIPA or a System SLIO CP 040 as Modbus RTU slave.
Call parameter
Name Declara-
tion
Type Description
ENABLE IN BOOL Activation/Deactivation Modbus server.
HARDWARE IN BYTE 1 = System SLIO CP 040 /
2 = VIPA SPEED7 CPU
LADDR IN INT Logical address of the System SLIO CP 040 (param-
eter is ignored with the VIPA SPEED7 CPU).
MB_UNIT_ID IN BYTE Modbus: Device identification = own address (1 ...
247).
MB_DATA_PTR IN ANY Modbus: Data buffer (only flag area or data block of
data type byte allowed) for access with function code
03h, 06h and 10h.
NDR* OUT BOOL New data were written by the Modbus client.
DR* OUT BOOL Data were read by the Modbus client.
ERROR* OUT BOOL Job is ready with error - parameter STATUS has error
information.
STATUS* OUT WORD Extended status and error information.
*) Parameter is available until the next call of the FB
Parameter in instance DB
Name Declara-
tion
Type Description
INIT STAT BOOL With an edge 0-1 an synchronous reset is established
at the System SLIO CP 040.
REQUEST_COUNT STAT WORD Counter for each received frame.
MESSAGE_COUNT STAT WORD Counter for each valid Modbus request.
BROADCAST_COUNT STAT WORD Counter for each valid Modbus broadcast request.
VIPA SPEED7
Modbus Communication
RTU > FB 73 - RTU_MB_SLAVE - Modbus RTU slave
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