
67
Slave Nr
1 byte
Funct
1 byte
1st bit addr.
2 bytes
Nr of bits
2 bytes
Nr Oct
1 byte
Data
CRC
2 bytes
00 0F 00 - 64 00 - 40 08 DD0 A DD7 XX - XX
Broad,
to all
Funct
15
64 bits
8 octets
Data
8 bytes
CRC
2 bytes
address
Fig. 123.- Control frame of the CPC3i card (MODBUS, function 15)
The meaning of 8 octets DD0 to DD7 is described in table 13-2.
Table 13-2.- Meaning of the 8 control bytes
where:
Thyristor n of the block or peripheral x (This number of peripheral, x, is the one
programmed in the rotating selector for each card).
The frame asks for the transmission of data to thyristors in up to 16 different steps,
phase by phase
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