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Appendix Special soft components
Appendix mainly introduces the functions of XD/XL series PLC special soft element, data
register, FlashROM and the address distribution of expansions for users to search.
Appendix 1
.
Special Auxiliary Relay
ID
Function
Description
SM000
Coil ON when
running
SM000 keeps ON
when PLC running
SM001
Coil OFF when
running
SM001 keeps OFF
when PLC running
SM002
Initial positive pulse
coil
SM002 is ON in first
scan cycle
SM003
Initial negative pulse
coil
SM003 is OFF in first
scan cycle
SM004
PLC running error
When SM4 sets ON, it indicates that there is an error
in the operation of PLC.
(Firmware version V3.4.5 and above supports this
function by PLC)
SM005
Battery low alarm coil
When the battery voltage is less than 2.5V, SM5 will
put ON (at this time, please replace the battery as soon
as possible, otherwise the data will not be maintained)
SM007
Power-off memory
data error
ID
Function
Description
SM011
10ms frequency cycle
5ms
5ms
SM012
100ms frequency cycle
50ms
50ms
Initial Status
(
SM0-SM7
)
Clock
(
SM11-SM14
)