GE Hydran 201i Instruction Manual page 248

Request
Response
Error
* N = Quantity of Output / 8, if the remainder is different of 0 --> N =N + 1
Table J-6 below presents, as an example, the reading of discrete outputs with the
address range 20–38. The starting address must be specified, followed by the quantity
to read. The return, in LSB format, can be seen in Table J-7 that follows.
Field Name
Function
Starting Address Hi
Starting Address Lo
Quantity of Outputs Hi
Quantity of Outputs Lo
X+15 X+14
* X = Starting address
Page 248
Function Code
Starting Address
Quantity of Coils
Function Code
Byte Count
Coils Status
Error Code
Exception Code
Table J - 5: Format for the Read Coils (01h) / Read Discrete Inputs (02h)
Request
Table J - 6: Reading of Discrete Outputs with the Address Range 20-38
1st word
X+13 ...
Table J - 7: Return in LSB Format
Hydran* 201i Instruction Manual
1 byte 01h
2 bytes 0000h to FFFFh
2 bytes 1 to 2,000 (07D0h)
1 byte 01h
2 bytes N *
n bytes n = N or N + 1
1 byte 81h
1 byte 01 or 02 or 03 or 04 or 06
Response
(hex) Field Name
01 Function
00 Byte Count
13 Output Status 27–20
00 Output Status 35–28
13 Output Status 38–36
X+3 X+2 X+1
(hex)
01
03
CD
6B
05
2nd word
X * X+31 ...
MA-033 Rev. 14.0, 12-Nov-18