Cutler-Hammer D320 PLC, Руководство пользователя

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Chapter 5: CPU Operation and Memory
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10. GPC
Graphic Programming Console. Cutler-Hammer offers two program loader software packages
for programming, monitoring, and configuring the D320 PLC. The DOS-based package is
GPC5, the Windows

-based package is WinGPC. In this manual, GPC is used to refer to
either of these programs.
Overview of CPU Operation Mode
What Is the CPU Operation Mode?
The CPU has an external RUN/REMOTE/PROG switch. The PLC performs a system check that
determines the position of the switch. The switch position determines which operating mode the PLC
is in. It can be in Run, Stop, Remote, or Error mode.
Run Mode (operating)
The D320 PLC reads the external input signals and executes the user program stored in RAM. The
external outputs are updated every scan according to program results.
Stop Mode
The user program is stopped and the external outputs are turned Off. In the Stop mode, you can
correct, delete, and transfer the program.
Remote Mode
The Remote mode allows the user to switch between the Run and Stop modes using the GPC software
instead of the mode switch. It is a convenient tool for program debugging. The Remote/Stop (or
Pause) mode is similar to the Stop mode using the switch, but it does not initialize data.
Error Mode
The Error mode occurs when the D320 PLC finds an error after running the self-diagnostics. When an
error occurs, the CPU stops program operation and turns off all external outputs. When the Error mode
occurs, do one of the following:
• Check the error code and take appropriate measures, then change power from Off to On.
•
Put the mode conversion switch in PROG. status and press the Initialize Key to clear the
Error.