App 3-2
1.3 Data format (RTU Mode)
SLAVE
Address
Function Code
MASTER(PLC etc.) send request to SLAVE, whereas response
to MASTER.
The signal receiving is illustrated here.
DATA
The data length is varied with the command (Function). CRC CHECK
Signal Interval
** The interval should be maintained at 10ms between command signal and request.
1.4 SLAVE(Address)
00H : Broadcast to all the drivers
01H : to the No.01 Drivers
0FH : to the No.15 Drivers
10H : to the No.16 Drivers
and so on....，Max to 32(20H)
1.5 Function Code
03H : Read the register contents
06H : write a WORD to register
08H : Loop test
10H : write several data to register(complex number register write)
2. CMS (Checksum and time-out definition)
2.1 LRC CHECK
Ex: ADDRESS 01H
FUNCTION 03H
COMMAND 01H
00H
DATA LENGTH 0AH
-----------------------
0FH------------true complement
Checksum = F1H
CS(H) = 46H (ASCII)
CS(L) = 31H (ASCII)
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