User manual

Publication 1760-UM001A-EN-P
Drawing a Circuit Diagram with Pico 4-13
Representation in Pico:
A coil automatically turns off if the power fails or if Pico is in Stop mode.
Exception: Retentive coils retain signal 1 (see Chapter 7).
Figure 4.3 Latching Relay
Representation in Pico:
Use relay functions “S” and “R” only once per relay. If
both coils are triggered at the same time, priority is
given to the coil further down in the circuit diagram.
This is shown in the preceding signal diagram in section
“B”.
Instruction Type Representation in Pico
Output Relay Q:
Q1… Q6 (depending on type)
Marker Relay M:
M1… M16
Text Display Relay D:
D1… D8 (1760-L18AWA)
Marker Relay (S marker):
S1… S8 (1760-L18AWA)
Instruction Type Representation in Pico
Output Relay Q: SQ1…SQ6, RQ1…RQ6 (depending on type)
Marker Relay M: SM1…SM16, RM1…RM16
Text Display Relays D: SD1…SD8, RD1…RD8 (1760-L18AWA)
Marker Relay (S marker): SS1…SS8, RS1…RS8 (1760-L18AWA)
S
R
AB
The “latch” and “unlatch” relay functions are used
in pairs. The relay picks up when latched and
remains in this state until it is reset by the
“unlatch” function.
Signal Diagram:
Set
Reset
Output
On
On
On
I1-I2-------SQ1
...
...
I2----------RQ1