26
DISCRETE HARDWIRED INPUTS Reading
The RVS-AXO incorporates 8 Discrete Inputs, (bit parameters).
Address
Input
Usage
0
Start / Stop
1
– Closed, 0 - Open
1
Reserved
2
Reserved
3
Reserved
4
Reserved
5
Reserved
6
Reserved
7
Reserved
Example 6:
To read Start / stop input status the host computer should send following Query frame:
Byte 1: Serial Link No.
($12)
Byte 2: Function
($02)
Byte 3: Starting Address High
($00)
Byte 4: Starting Address Low
($00)
Byte 5: No. of Points High
($00)
Byte 6: No. of Points Low
($01)
Byte 7: CRC_Low
($XX)
Byte 8: CRC_High
($XX)
The RVS-AXO response, when Start/Stop input is closed:
Byte 1: Serial Link No.
($0C)
(12)
Byte 2: Function
($02)
Byte 3: Byte Count
($01)
Byte 4: Data
($01)
(Start / Stop Input Is Active)
Byte 5:
Byte 6:
CRC_Low
CRC_High
($XX)
($XX)
