date: 2025/1/15
The lamp lights up even though the bit in the lamp device memory is not ON (OFF).
<Cause>
The lamp device memory is used redundantly.
<Solution>
Check if the same address as the lamp device memory is used in the screen data or in the PLC program.
Depending on the value set for [No. of Patterns], the number of device memory addresses used will vary.Check the availability of these memory addresses.
Example: When five lamps (No. of Patterns: 3) are configured
consecutively from lamp device memory M0000 (bit):
OFF ON P3
Wrong Correct
When "3" is set for [No. of Patterns], 2 bits are used.
- L1 (M0000/M0001)
- L2 (M0002/M0003)
- L3 (M0004/M0005)
- L4 (M0006/M0007)
- L5 (M0008/M0009)
As the number of patterns is increased, the number of bits used is also increased.
L1 lamp example:
- OFF display M0000 : OFF, M0001 : OFF
- ON display M0000 : ON, M0001 : OFF *
- P3 display M0000 : OFF, M0001 : ON
* Since the higher bits have priority, P3 display is shown when M0001 is ON.
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