Ethernet/IP bus interface for DIOLINE20 Vers. 1.00
Notes
44/45
6 Notes on operating digital output modules
(1) Slot status
– this is set by the output modules in case of the following errors:
+ Short-circuit of output to GND
+ Output overload / overtemperature
+ Feedback to the output (short to 24 V DC) due to wiring errors or a defect in the module itself.
(2) The outputs (output drivers) cannot be destroyed by short-circuit, overload or feedback. However,
we recommend you switch-off as soon as possible to prevent degeneration and concomitant reduction
in lifetime.
-
Behaviour of the 16 out / 8 in+8 out module:
Short-circuit is detected by the module and an error alarm is issued via the L-Bus / process
bus (slot status etc. see above). Troubleshooting is passed over completely to the application.
The module itself does not switch off the outputs. This allows a short-circuit to be driven or
switched off. The output driver behaves as described above. We recommend the following
procedure to save the module from undue stress.
(1) Permanent monitoring of slot status and any error signalised.
(2) If the slot status at an output module is set to "error", then all outputs on this L-Bus module
should be switched off whenever this is possible. If the slot status error then disappears, then
this is a short-circuit/overload error. If required, single outputs can then be put back into
operation to further localise the error. If the slot status error once more occurs, then the last
input switched on is most probably the source of the error.
If all outputs of a group have been switched off and the slot status error continues to be
queued, then this is due to feedback caused by the periphery or the module itself is defective.
-
Behaviour of the 8 out + diagnostics module (4 potentials)
Troubleshooting is also passed on completely to the application for this module. It is therefore
possible to drive a short-circuit or to switch it off by selecting a channel. The diagnostics state
of the outputs is available as a "normal" process variable. Slot status is not used for this
module because detailed diagnostics data exist in the process data. We also recommend here
that the appropriate output be switched off as soon as possible.
Data structure of module:
à 8-bit output data
à 16-bit input data (8-bit readback data directly from the output te8-bit driver status
("0" = OK ; "1" = short-circuit, overtemperature)
