1. Installation
1-11
Festo P.BE-CPX-PNIO-EN en 1407c English
Note
(1) Diagnostics mode reduces the available address space
Use of the diagnostics mode (status bits or I/O diagnostics
interface) occupies 8Ior 16 I/O bits and thus reduces the
number of I/O bits which are available for module commu-
nication. In this way, the number of addressable modules
is reduced in favour of additional status or diagnostic in-
formation.
Take account of this fact for the planning of your CPX ter-
minal.
(2) Subsequent activation changes configuration
During subsequent activatio n of the diagnostics mo de
(status bits or I/O diagnosti cs interface), the CPX-internal
I/O illustration or address allocation can be shifted.
The system controller carries out this adjustment automat-
ically. Manual manipulati on, e.g. a reconfigurati o n of the
CPX terminal or manual adaptation of the hardware and
network configuration, are not required.
Assignment of the I/O addresses and diagnostics ad-
dresses can be changed as needed.
To do this, repeat the hardware and network configuration
in your configuration and programming software (e.g.
Siemens SIMATIC STEP 7), especiall y the assignment of the
inputs and outputs (see section 2.7.1 and section 2.7.2).
(3) Setting the diagnosti cs mo de via the hardware config-
uration
Starting with Revisi o n 21, the diagnostics mode can be set
via the hardware configuration. The av ailable address
space thereby remains intact: The number of I/O bits is not
reduced; the I/O bits are available for module communica-
tion without restriction.
Set the DIL switch
2
to the factory setting for this pur-
pose (see Tab. 1/2). Parameterise the diagno sti cs mo de
via the hardware configuration.
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