Mitsubishi Electric MELSEC-Q Structured Programming Manual page 25

FXCPU Structured Programming Manual
[Device & Common]
• Caution
When the battery voltage becomes low due to expiration of the battery life or another reason, programs
(not stored in a memory cassette), latched (backed-up) type devices and clock data are not held correctly.
Clear latched type devices, and transfer programs (not stored in a memory cassette) again. In addition, set
the initial values and clock data if necessary.
→ For rough guide to the life and replacement timing of the battery, refer to the User's Manual
3) Types of bit device memory
Contact image memory
(X, Y, M, S)
Timer contact
Time counting coil
Reset coil (T)
Counter contact
Counting coil
Reset coil (C)
*1. Some devices are cleared when the PLC mode switches from STOP to RUN.
*2. When the battery voltage becomes lower than the holding voltage, the device status is not held
correctly.
→ For the latched type device clear method, refer to Subsection 1.2.5.
Item Power OFF
Input relay (X)
Output relay (Y)
General type auxiliary
relay (M)
Latched (backed-up) type
auxiliary relay (M)
Special auxiliary relay (M)
General type state relay
(S)
Latched (backed-up) type
state relay (S)
Annunciator (S)
For 100 ms
For 10 ms
Retentive type for 100 ms
Retentive type for 1 ms
General type
Latched (backed-up) type
High speed type
1.2 Program Memory and Devices
[Hardware Edition] of each PLC.
Power OFF→ON
Cleared.
Does not change while M8033 is ON.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Set to initial
Cleared.
*1
value.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Does not change.
Does not change.
Cleared.
Does not change while M8033 is ON.
Does not change.
Does not change.
→ For special auxiliary relays, refer to Chapter 4.
1 Device Outline
STOP→RUN RUN→STOP
Does not change.
Cleared.
Cleared.
*1
Does not change.
Cleared.
Cleared.
Cleared.
Cleared.
Cleared.
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