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Appendix 3. PLC Development Environment using GPPQ
3.6 PLC-Related Data Development Procedure
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3.6.7 Reading and Comparing from the Controller
The following describes the method of reading and comparing a message from the CNC controller
to the GPPQ. The method of reading and comparing is the same as that of ladder codes. Ladder
codes and message data are distinguished by their file names only.
(1) Menu Selection/Screen Operation
Refer to the following sections for operation methods.
For reading : "3.5.3 Ladder read from the C64 controller"
For comparing : "3.5.4 Ladder comparison with the C64 controller"
(2) Message Read Format
The message description format was shown in "3.6.3 (1) Description Format", but there are no
special rules concerning provision of descriptions in the setting area or the order of message
description in the message area. For that reason, the description format may differ between transfer
and reading of the message data.
The following shows the format during reading as the "Standard description format".
Standard description format of message data
A
larm message setting
…
(1)
Operator message setting
PLC switch setting
Comment message setting
A
larm messages
…
(2)
Operator messages
…
(3)
PLC switches
…
(4)
Comment messages
…
(5)
NOPLF
END
(a) Setting area
The settings are described in order of alarm, operator, PLC switch and comment.
The maximum value is described if the setting is abbreviated.
(b) Alarm messages
Each message data is described in order of the index Nos.
(c) Operator messages
The same as the alarm messages.
(d) PLC switches
Each message data is described in order of the switch Nos.
(e) Comment messages
These messages are described in the same order as described before transfer.
(f) Others
• Spaces and tabs are not included before and after the comma(,) separating the message data
factors.
• The message character string is handled the same as normal data even when blank.
• The NOPLF code between messages is described to the position to which the message data
following the NOPLF code during transfer moved.