C Counter; L Link Relay - Panasonic FP7 Series Command Reference Manual

2.5 Explanations about Relays

2.5.6 C Counter

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How counter (C) works
● When the decrement-type preset counter is activated and the counter value reaches zero,
the counter contact with the same number as the counter turns ON.
● When the counter's reset input is turned ON, the counter contact turns OFF.
● All counters are hold type.
Count input
Reset input
Cn
Counter contact: ON
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Usage restrictions
● When used as contacts, there are no restrictions on the number of times that can be used.

2.5.7 L Link relay

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How link relay (L) works
● Link relays are relays for when multiple controllers are connected in a network, as a "PLC
link" relay for shared use between controllers.
● If the operation result is output to a link relay (coil) on a PLC, it is sent to other PLC
connected in the network, and the operation result is reflected in link relays (contacts) with
the same number.
● You can send and receive bit information between PLCs in this manner when using link
relays.
2-20
Counter no.
CT n
Count up
U0
Cn：ON
n: Counter no.
WUME-FP7CPUPGR-12