Mitsubishi Electric MELSEC Q Series Programming Manual page 97

3 START-UP PROCEDURES
(3) Device setting
Assign the device range (Refer to Section 4.2.) used in the sequence programs
for safety observation in case of changing the device points setting.
No restriction in the latch setting.
POINT
(1) When the device points setting of PLC CPU is changed, turn OFF and ON the
controller after deleting the sequence programs for safety observation
(SSU_CMP, SLS_CMP, SNT_CMP) once. The write-inhibited password is set
for the sequence programs for safety observation (SSU_CMP, SLS_CMP,
SNT_CMP). Input "sFTy" to delete the password.
(2) If "self-diagnostic error (error code: 2500)" in the PLC CPU or "Safety
observation error (error code: 34)" in the Motion CPU will occur at the system's
power supply ON or after 24-hour continuous operation, check the following
items.
1) The device range (Refer to Section 4.2.) used in the sequence programs
for safety observation is included in the device point setting D (excluding
extended D)/M/T.
2) When the device points setting or "Indexing setting of ZR device" is
changed, the sequence programs for safety observation is delete once.
(3) Be sure to check that the devices shown in Section 4.2 are not used in the
user program before shipment.
When the setting of
delete the sequence programs for
safety observation once.
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is changed,
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