Panasonic FP (Sigma) - Manual (Page 6)

6
FPΣ (Sigma)
Optimised communication functions
With the RS485 type communication cassette...
Despite being compact you can create powerful PLC links!
More links than you imagined a compact PLC could achieve
(2,048 link relays / 256-word link data registers)
࡯ Can be used to share product type between different machines.
࡯ Can be used for interlocking between different machines.
࡯ Easy wiring between PLCs with twin-core cabling.
Masterless communication method
(when PLC linkage is achieved with link relays and link data registers)
The masterless communication method means that even if a connected device (station) goes into power off, operations to
automatically switch the master station continue. Start up is smooth and the recovery from malfunctions is also potentially faster.
࡯ If the master station is not on,
communication cannot take place.
࡯ Errors occur when devices are not
turned on in sequence.
Use of insulated RS485
Uses the insulated RS485, which is highly reliable and largely impervious to noise.
High-speed communication over long distances are enabled.
࡯ Transmission speed: Max. 115.2kbits/s ࡯ Transmission distance: Max. 1.200m
࡯ Even if a station goes into a power-
off state, communications between
the other stations continue.
RS485
Link data register
Product type data
Process
machine
Link data register
Product type data
Assembly
machine
Link data register
Product type data
Inspection
machine
Previous models
Usual master-slave communication
With the FPΣ (Sigma)
Masterless communication using the FPΣ (Sigma)
Slave
station
Master
station
Slave
station
Slave
station
Slave
station
Link
station
Link
station
Link
station
Link
station
Ȩ
Ȩ
1-channel RS232C type.
2-channel RS232C type.
1-channel RS485 type.
1-channel RS232C + 1-channel RS485 type.
Four types of communication cassettes enable:
࡯ efficient connection to serial devices
࡯ transmission speeds of up to 115.2kbits/s
࡯ long transmission distance of up to 1200m
In addition, the green screw terminal is removable
for easy wiring.
20060227_FP_Sigma.qxd 15.02.2006 14:55 Uhr Seite 6
02/2006