Festo 174335, Electronic Manual

Page: 140 / 184

5. Diagnosis and error treatment
5-18
Festo P.BE-VIFB13-03-EN en 0003c
5.3.1 Short circuit/overload
During a short circuit or overload, the error code “Short cir-
cuit/overload” is entered in the 4 status bits of the node.
Depending on the field bus protocol used, the terminal pro-
vides one or more diagnosis status registers (bytes, words).
Most of the field bus protocols can therefore detect and
evaluate a short circuit (see Chapter 5.4).
Short circuit/overload at an IO module
Valve terminals type 03 or 04-B can be equipped, amongst
others, with the following IO modules:
– Output modules
– High-current output modules
– Multi-I/O modules
– Input modules
– Input modules with fuses
The behaviour of these modules during short circuit/overload
is described in the “Supplementary description of the I/O
modules”.