Sensor Evaluation Of The Fail-Safe Channels - Siemens SIMATIC HMI KP Series Operating Instructions Manual

9.6

Sensor evaluation of the fail-safe channels

Note
For digital inputs that are reserved with a fail-safe channel, the process image described in
the chapter "Bit assignment in the process image (Page 91)" is not used.
The fail-safe channels occupy the following address areas in the process image of the fail-
safe controller:
x
The first byte in the process image describes the switch state of the connected sensors or a
connected EMERGENCY-OFF button. The setting is described in the section "Setting KP8F
- STEP 7 (Page 64)".
Note
The unused bits in the byte 0 are always "0".
The following evaluations are possible:
● No evaluation
Slot 2 was not set. No evaluation occurs.
● 1oo1 evaluation
The slot 2 was set with "1oo1 (1v1)-evaluation, one-channel". The connected sensor is
evaluated.
Bits 4 and 5 determine if the respective sensor contact is open or closed. The bits may
take on the following values:
– 0 = Open sensor contact
– 1 = sensor contact closed
KP8, KP8F
Operating Instructions, 10/2010, A5E03284305-01
Input area
x + 0 to x + 4
The start address for the input and output range.
The address was entered on the "Addresses" tab in the HW Config in the object
properties of the module "KP8F, Slot 2".
Technical specifications
9.6 Sensor evaluation of the fail-safe channels
Output area
x + 0 to x + 3
93