4. COMMUNICATION PROTOCOL
IMSRM04-E8
29
4.1.2 Polling procedure example
(When the host computer requests data)
Normal transmission
E
O
T
0001S1
E
N
Q
A
C
K
04H 30H 30H 30H 31H 53H 31H 05H 06H
S
T
X
S101 400 . 0
…
E
T
X
B
C
C
02H 53H 31H 30H 31H 20H 20H 34H 30H 30H 2EH 30H 03H 67H
E
O
T
04H
S
T
X
P111
…
E
T
X
B
C
C
02H 50H 31H 31H 31H 20H 03H 48H
If error exists in data
E
O
T
0001S1
E
N
Q
N
A
K
04H 30H 30H 30H 31H 53H 31H 05H 15H
S
T
X
S101 400 . 0
…
E
T
X
B
C
C
02H 53H 31H 30H 31H 20H 20H 34H 30H 30H 2EH 30H 03H 68H
E
O
T
04H
S
T
X
S101
…
E
T
X
B
C
C
02H 53H 31H 30H 31H 20H 03H 67H
Above example data is with 1 digit below decimal point. The data sent from control unit is
different from the specification of control unit.
Continue to
c
Continue to
c
c
c
Operatio
n panel
address
*
Operatio
n panel
address
Polling address
Polling address
Unit
address
Unit
address
Next send data, SR Mini SYSTEM send
Resend data, SR Mini SYSTEM send
Send data, SR Mini SYSTEM send
Send data, SR Mini SYSTEM send
Host computer send
Host computer send
Host computer
Host computer
Host computer
Host computer
Data
Data
Channel No.
Channel No.
Identifier
Identifier
*Omit the operation panel address when the
connection is made directly to control unit.
Identifier
Identifier
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