Emerson PACSystems RSTi-EP - Page 281

User Manual Section 5
GFK-2958L May 2021
Detailed Description of I/O Modules 267
Action
Input Byte 0 (Status) of
Module
Input
Byte1
(length
of RX
byte
seg.)
Output byte 0 (control) off the
module
Output
byte 1
(length
of TX
byte
seg.)
Notes
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Stat
TX_CNT_
ACK
RX_CNT
STATR
ES
RX_CNT_ACK
TX_CN
T
Init/
Startup
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
After
power-up,
module is
ready for
communica
tion
Activat
e
commu
nicatio
n
1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
PLC is ready
for
communica
tion
(response)
Receive
data
1
0
0
0
1
0
0
0
N
(1 ..14)
1
0
0
0
0
0
0
0
0
Module has
received
bytes
1
0
0
0
1
0
0
0
N
1
0
1
0
0
0
0
0
0
RX
acknowledg
e after data
taken over
Send
data
1
0
0
0
1
0
0
0
X
1
0
1
0
1
0
0
0
N
(1...14)
Before
changing
TX-CNT, set
TX bytes
1
0
1
0
1
0
0
0
X
1
0
1
0
1
0
0
0
N
TX
acknowledg
e after
module sent
data