Specifications

7. Application Instructions
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
7-46
START:
ES / EX / SS / EP series: keep none input signal to be greater or equal
to 10 ms.
EH series:
Baud
Rate(bps)
RTU Timeout
Timer(ms)
Baud
Rate(bps)
RTU Timeout
Timer(ms)
300 40 9600 2
600 21 19200 1
1200 10 38400 1
2400 5 57600 1
4800 3 115200 1
Communication Address:
00 H: broadcast all drives
01 H: toward the drive at the 01 address
0F H: toward the drive at the 15 address
10 H: toward the drive at the 16 address…..,
and consequently, the Max. to be reached is 255 (FF H).
Function code:
03 H: read the contents of the register
06 H: write one WORD into the register
01 H: write the contents of the register
Data Characters:
The data contents that user transmits
CRC check:
The CRC check starts from “ Address” and ends in “ Data Content” . Its
calculation is as follows:
Step 1: Load the 16-bit register (the CRC register) with FFFFH.
Step 2: Exclusive OR the first 8-bit byte message command with the
16-bit CRC register of the lower bit, then save the result into
the CRC register.
Step 3: shift the CRC register one bit to the right and fill in 0 to the
higher bit.
Step 4: check the value that shifts to the right. If it is 0, save the new
value from step 3 into the CRC register, otherwise, Exclusive
OR A001H and the CRC register, then save the result into the
CRC register.
Step 5: repeat step 3 and 4 and calculates the 8-bit.
Step 6: Repeat Steps 2~5 for the next 8-bit message command, till all
the message commands are processed. And finally, the
obtained CRC register value is the CRC check value. What
should be noted is that the CRC check must be placed
interchangeably in the check sum of the message command.
END:
ES / EX / SS / EP series: keep none input signal to be greater or equal
to 10 ms
EH series:
Baud
Rate(bps)
RTU Timeout
Timer(ms)
Baud
Rate(bps)
RTU Timeout
Timer(ms)
300 40 9600 2
600 21 19200 1
1200 10 38400 1
2400 5 57600 1
4800 3 115200 1