Commissioning Of The Cpx Terminal On The Fieldbus; Hold/Clear And Fail Safe; Run/Pause And Stop Of The Master; Ras Function - Festo CPX Series Manual

3 Commissioning as function module F24
3.4

Commissioning of the CPX terminal on the fieldbus

In order to avoid errors (e.g. configuration and parameterisation errors) during commissioning:
• Please observe general commissioning instructions in the CPX system description
(P.BE-CPX-SYS-...).
• Check the DIL switch settings before using and replacing CPX terminals.
• Check the address assignment of the I/Os on the CPX terminal.
• Check the configured address range and test the I/Os if necessary.
3.4.1

HOLD/CLEAR and Fail Safe

The CPX terminal supports the CC-Link function HOLD/CLEAR. System-specific states of the digital out-
puts can therefore be defined in the event of an error.
The reaction of digital outputs in case there is a fault is defined with the relevant DIL switch setting
( section 2.4.9).
3.4.2

RUN/PAUSE and STOP of the master

In the STOP mode of the CC-Link master (e.g. by interruption of communication) the state of the digital
outputs in bit-field (RY) of the DIP switch setting HOLD/CLEAR dependent.
The following table shows the reaction according to CC-Link specifications:
CC-Link master status
RUN/PAUSE
STOP
Tab. 3.5 RUN/PAUSE and STOP of the master
Note
Analogue outputs (RWw) always keep their status regardless of the set HOLD/CLEAR
function .
3.4.3

RAS function

The CPX terminal supports the RAS functions (Reliability, Availability, Serviceability) of the field bus
CC-Link.
Functions for separating from slave stations
– Even if a decentral or local station fails (e.g. voltage drop), the network operation will not be im-
paired.
– A defective slave station can be replaced whilst the network is in operation (the voltage of the sta-
tion to be replaced must be switched off ).
– When a station is linked into the system again after a fault has been eliminated, it is not necessary
to reset the master station.
Monitoring the communication status
– The network can be monitored by the master station during system set-up, during debugging or
during maintenance.
48
DIL switch setting
CLEAR
Normal operation (Refresh)
Die digital outputs (RY) are
reset (value: 0).
HOLD
The digital outputs (RY) retain
their status.
Festo – P.BE-CPX-FB23-24-EN – 1305a – English