GE EP-5261 - Communication State Management; Status and Control Word Table

RSTi-EP Slice I/O Serial Communication Module 9
GFK-2992B
The status and control word values during various states of communication are provided in the following table.
Action
Input Byte 0 (Status) of Module
Input
Byte 1
(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 STATRES RX_CNT_ACK TX_CNT
Init/
Startup
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
After
powerup,
module is
ready for
communi-
cation
Activate
communi-
cation
1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
PLC is
ready for
communi-
cation
(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
acknow-
ledge 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
acknow-
ledge after
module
sent data
For public disclosure