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7-1. Self-diagnostic Function
2. Operation Status When an Error Occurs
When an error occurs, the FP1 usually stops operating. However, regarding duplicated output errors, a backup battery
abnormality, and operation errors, you can continue operation by changing the system register settings.
1) Duplicated Output Error (Total-check Error)
• If the duplicated use of output is detected, the FP1 stops operating and the ERR. LED turns ON.
When you change system register 20 settings using the FP Programmer II or NPST-GR Software, duplicated output
is not regarded as an error and the FP1 continues to operate. In this case, the ERR. LED does not turn ON.
Duplicated output error: system register 20 (K1 or ENAB)
[FP Programmer II: K0 (stops operation), K1 (continues operation)]
[NPST-GR Ver.3.1: DISA (stops operation), ENAB (continues operation)]
2) Battery Error (Self-diagnostic Error)
• If the voltage of the backup battery lowers or if the backup battery disconnects, the ERR. LED turns ON.
Battery error: system register 4 (K1 or NO)
[FP Programmer II:
K0 (stops operation), K1 (continues operation)]
[NPST-GR Ver. 3.1: YES (stops operation), NO (continues operation)]
Notes:
3) Operation Error (Self-diagnostic Error)
• When an instruction [high-level and some basic (e.g., ST=) instructions] executes abnormally, an operation error
occurs. When an operation error occurs, operation of the programmable controller stops and the ERR. LED turns
ON.
However, when you change system register 26 settings using the FP Programmer II or NPST-GR Software (Ver.3.1
or later), the FP1 continues to operate. In this case, even if the FP1 continues to operate, this is regarded as an error
and the ERR. LED stays ON.
Operation error: system register 26
[FP Programmer II: K0 (stops operation), K1 (continues operation)]
[NPST-GR Ver.3.1: STOP (stops operation), STRT (continues operation)]
• C14 and C16 series FP1s do not have a backup battery. Battery errors occur only for C24, C40, C52, and
C72 series FP1s.
• FP1s with the battery error disregarding function have CPU version 2.7 or later (all FP1s with a suffix “B”
on the part number have this function).
Summary of Contents for FP1
Page 1: ...PROGRAMMABLE CONTROLLER FP1 is a global brand name of Matsushita Electric Works Hardware ...
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