
112
6-1. Self-diagnostic Function
6-1. Self-diagnostic Function
FP-M programmable controllers use the self-diagnostic function when something goes wrong with them.
The abnormalities detected by the self-diagnostic function are divided into three categories:
• Self-diagnostic error
This type of error is detected when the following occurs:
- Hardware problem in CPU or ROM, and backup battery problem (ROM, system, interrupt, or battery abnormality).
- An instruction is incorrectly executed in RUN mode (operation error).
• Total-check error
This type of error is detected by a total-check operation when the following occurs. The total-check operation is
performed when the mode selector is changed from PROG. to RUN.
- Program abnormalities such as syntax errors, duplicated use of output, and instruction combination errors.
(syntax error, duplicated output error, mismatch error, program area error, operand error)
The total-check operation can also be performed by using the FP Programmer II (OP9 function) or the NPST-GR
Software [“1.TOTALLY CHECK A PROGRAM” (menu 1) or “V.TOTALLY CHECK” (menu 2)].
• System watchdog timer error
This type of error is detected when the following occurs:
- program scan time is extraordinarily long
- hardware abnormality is detected
1. Operation Monitor LEDs When an Error Occurs
• The status of the operation monitor LEDs on the FP-M
control board vary, as shown in the table below.
Content
Normal operation
RUN
PROG.
RUN
PROG.
RUN
PROG.
RUN
PROG.
RUN
PROG.
RUN
ON
OFF
Flash
OFF
Varies
OFF
OFF
OFF
Varies
Varies
PROG.
OFF
ON
OFF
ON
Varies
ON
ON
ON
Varies
Varies
ERR.
OFF
OFF
Varies
Varies
ON
ON
ON
OFF
Varies
Varies
ALARM
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
Position of the
mode selector
When a self-diagnostic
error occurred
When a total-check error
occurred
When a system watchdog
timer error occurred
LED status
Forced ON/OFF
Operation monitor LEDs
FP-M control board
RUN
REMOTE PROG.
Mode selector
RUN PROG. ERR. ALARM
Содержание FP-M Hardware
Страница 1: ...FP M Hardware ACG M0045 1 94 12 FP M Hardware PROGRAMMABLE CONTROLLER ...
Страница 44: ...36 ...
Страница 118: ...110 ...
Страница 266: ...258 RECORD OF CHANGES ACG No Date Description of Changes ACG M0045 1 DEC 1994 First edition RECORD OF CHANGES ...
Страница 267: ......
Страница 268: ......