Panasonic FP7 Series Command Reference Manual

2.5.4 SR System relay
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How system relay (SR) works
● A system relay turns ON or OFF under specific conditions.
● Its ON or OFF state is not externally output. It only operates within a program.
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Types of system relays (SR)
Classification Function Example
Operation status
flag
Operation status is indicated by
ON or OFF.
Under operation (RUN) (SR20), under forced input/output
(SR29), results of comparison instruction (SRA to SRC)
Error flag
Turns ON when an error occurs
and indicates abnormalities.
Operation error (SR7, SR8)
Relay that turns
ON or OFF under
specific
conditions
Can be used with the desired
conditions in the program.
Normally ON relay (SR10), ON/OFF for each scan (SR12)
Initial pulse relay (SR13 to SR14), clock pulse (SR18 to
SR1E)
2.5.5 T Timer
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How timer (T) works
● When a timer is activated and the set time elapses, the timer contact with the same number
as the timer turns ON.
● When the timer is in the time-up state and the timer execution condition turns OFF, the timer
contact turns OFF. All timers are non-hold type.
Time up
TMX n U0
Tn：ON
Timer contact: ON
Timer no.
n: Timer no.
Tn
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Usage restrictions
● When used as contacts, there are no restrictions on the number of times that can be used.
2.5 Explanations about Relays
WUME-FP7CPUPGR-12 2-19

Panasonic FP7 Series Specifications

General

Brand	Panasonic
Model	FP7 Series
Category	Controller
Language	English