User manual

3–11
Chapter 3 – Installation and Wiring
LT Series User Manual
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 Power Interruptions
When a power supply interruption is 10 ms or longer, the LT unit's power will also
stop. Also, when a power interruption occurs, operation will stop even while a
command is being issued.
For example, if the power is cut while an FMOV command is sending data in 100-
word units, command execution will stop.
When designing the program, allow for the possibility of a power interruption.
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 Emergency Stop Circuits
Do NOT send an Emergency Stop signal to the LT, and do NOT use the LT unit’s
internal software to process an Emergency Stop signal.
As shown below, be sure to create the Emergency Stop circuit outside the LT.
LT
Emergency Stop Button
B contact
Power source
AC DC 24V
Output
Input
Controlled
System