5-2
5-1 Diagnosis using Error Codes
If the 3F88L-160/162 Cam Positioner detects an error, the error code (E-**)will appear in
the SPEED/ON display. All control outputs (RUN, M⋅DET, ERROR) will turn OFF. The
cam output will vary depending on the output hold function settings.
The Cam Positioner errors will be detected during the following processes.
S At power ON: Hardware check, program check, and power interrupt check during pro-
gram write/save.
S During operation: Error check in RUN mode.
S During programming: ON region duplication errors in PRGM mode, cam data protect
input prohibit checking, etc.
S While setting parameters: Communications error checks in SET mode.
If an error code is displayed, determine the cause and take appropriate countermea-
sures.
H Errors Codes and Countermeasures
Note The “F” mark in the cam output column indicates that cam outputs are turned OFF regardless of
the output hold settings. The “f” mark indicates that if output hold is set, the output status immedi-
ately before the error was generated will be maintained. If output hold is not set, cam outputs will
be turned OFF. (Refer to 3-6-9 Output Hold Function for information.)
Error
code
Error name Description Cam
output
Probable
cause
Possible solution Error reset
method
E-00 Hardware
failure
Memory
read/write
check error
when power
turned ON.
F
Malfunction
due to noise
(system
recovers when
power is
turned ON
again.)
Check if noise has
been generated
when or after the
power was turned
ON and take
appropriate
countermeasures
against the noise.
Turn the
power ON
again.
The Cam
Positioner is
malfunctioning
(system does
not recover
when power is
turned ON
again.)
Replace the Cam
Positioner.
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Operation Chapter 5
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