Control Codes; Command Codes - Panasonic GT02 Manual

4.1.5 Control Codes

The control codes (header and terminator) are as follows.
Name
Header
Terminator
NAK

4.1.6 Command Codes

The command codes are as follows.
Command codes used for commands transmitted from external device to GT
Type
WDR
SRR
Read
PRR
WRR
WDW
BDW
DDW
SDW
Write
WRW
BRW
DRW
SRW
Command codes included in messages transmitted from GT to external device
Type Character
WDR
Send
SRR
message
WRR
Note:
By touching the function switch to change the screen number on the GT screen, the value of the N+2
word device in the basic communication area changes from the value of the screen number before the
change to the value after the change. At that time, a message is sent by the "WDR" command to the
external device from the GT. Even when the GT internal device is not directly operated like this, the
information on the internal device changed by the GT internal operation may be sent to the external
device as a message.
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Character
?
CR
NAK
Character ASCII code
57
53
50
57
57
42
44
53
57
42
44
53
ASCII code
57 44
53 52
57 52
ASCII code
3F
0D
15
44 52 Read data area in word unit
52 52 Read single relay bit
52 52 Read multiple relay bits
52 52 Read relay in word unit
44 57 Write data area in word unit
44 57 Write data area in byte unit
44 57 Write data area in digit unit
44 57 Write data area in bit unit
52 57 Write relay in word unit
52 57 Write relay in byte unit
52 57 Write relay in digit unit
52 57 Write relay in bit unit
52 Send information on data area in word unit
52 Send information on single relay bit
52 Send information on relay in word unit
Function
Beginning of a message.
Completion of a message.
Response when an error occurs.
Function
Function