Array electronic SH-300 - Page 92

SH-300 Text Panel
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When writing coil M25 status the data format of query message from SH-300 and response
message from controller is shown as following:
Byte
NO.
Query format (controller receive)
Example
Response format (controller
send)
Example
0
Framing starting
55
Framing starting
55
1
Framing starting
55
Framing starting
55
2
Device address
01
Response status
FF
3
Function code
41
Device address
01
4
Address offset
00
Function code
41
5
Reserved byte
00
Address offset
00
6
Reserved byte
00
Reserved byte
00
7
Address high order bit (Hi)
00
Reserved byte
00
8
Address high order bit (Lo)
00
Address high order bit (Hi)
00
9
Address Low order bit (Hi)
00
Address high order bit (Lo)
00
10
Address Low order bit (Lo)
00
Address Low order bit (Hi )
00
11
Coil status value。0xFF express M
ON，0x00 express M OFF。
FF/00
Address Low order bit (Lo)
19
12
Reserved byte
00
Reserved byte
00
13
Reserved byte
00
Reserved byte
00
14
Reserved byte
00
Reserved byte
00
15
Reserved byte
00
Reserved byte
00
16
Verify value
04/05
Verify value
04
3. Read single byte of Register B（0X42）
Use this function code to read the value of single byte of Register in controller. The query message
specifies the Register address. Registers are addressed starting at zero: Register 0 is addressed
as 0.
4. Write single byte of Register B（0X43）
Use this function code to write the value into the single byte of Register in controller .The query
message specifies the Register address and the value of single byte to be written. Registers are
addressed starting at zero: Register 0 is addressed as 0
5. Read single Register W（0X44）
Use this function code to read the value of single Register in controller. The query message
specifies the Register address. Registers are addressed starting at zero: Register 0 is addressed
as 0. the Register data in the response message occupy two byte. the first byte contains the high