3. RKC COMMUNICATION PROTOCOL
IMR02F04-E1
22
3.1.2 Polling procedure example
(When the host computer requests data)
Normal transmission
(1) When the measured value (PV) monitor (identifier: M1) is polled
(2) Polling the next identifier with ACK (acknowledgment) after polling ends
E
O
T
04H
0
30H
0
30H
M
4DH
1
31H
E
N
Q
05H
Host computer send
S
T
X
02H
M
4DH
1
31H
0
30H
1
31H
0
30H
0
30H
.
2EH
0
30H
E
T
X
03H
E
O
T
04H
Address Identifier
Identifier
Data
Controller send
Host computer send
B
C
C
E
O
T
04H
0
30H
0
30H
M
4DH
1
31H
E
N
Q
05H
Host computer send
S
T
X
02H
M
4DH
1
31H
0
30H
1
31H
0
30H
0
30H
.
2EH
0
30H
E
T
X
03H
A
C
K
06H
Address Identifier
Identifier
Data
Controller send
Host computer send
B
C
C
To
*1
E
O
T
04H
Host computer send
S
T
X
02H
H
48H
P
50H
0
30H
0
30H
1
31H
0
30H
.
2EH
0
30H
E
T
X
03H
Identifier
Data
Controller send
B
C
C
*1
