Weld334m - User’s manual
F356-IOE I/O Expansion Card
43
P23 . Functional description of output signals
Pin Signal Function
12 STATUS
Welding current enable. Active at 24V.
It indicates the condition for Weld Yes; when this function is
enabled, this output is high. (see also WeldYes)
13 EVSA
Piloting output of the channel A welding solenoid valve. Active
at +24V.
It is activated by the corresponding start and is protected
through interlocking (consisting of 2 relays) which inhibits the
simultaneous call of channel B.
If the Start signal is dropped before the pressure cycles are
completed, the call is not recognised and the electrodes go
open again.
When the pressure cycles are completed, the Start signal
stays in the self-holding mode up to the end of the Holding
cycles.
(See cycle time diagrams in the programming manual).
14 EVASA
Active at +24V.
Piloting output of the channel A additional opening solenoid
valve. It is also known as pre-stroke or pre-approach solen.
Valve.
Activated by the CEVASA control, this output is protected by
an interlocking, consisting of 2 relays, which inhibits the
simultaneous call of channel B pre-stroke.
See cycle time diagrams for the relevant timing.
15 EVSB
Piloting output of the channel B welding solenoid valve.
Same as EVSA but for channel B.
16 EVASB
Piloting output of the channel B additional opening solenoid
valve.
Same as EVASA but for channel B.
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