Behavior When Communication To Io Controller Is Faulted; Indications To The Io Controller - Siemens SIPROTEC PROFINET IO Manual

2 PROFINET IO in SIPROTEC

2.10 Behavior When Communication to IO Controller is Faulted

2.10 Behavior When Communication to IO Controller is Faulted
The following behavior is defined for SIPROTEC devices when the communication to the IO controller is
interrupted:
After Having Recognized that the Connection Is Interrupted
1. The marking SysIntErr. (error of system interface) in the SIPROTEC device is set to ON (logging in the
operational indication log, processing in CFC possible).
2. The state of the outputs or switchgear has not changed compared to the state before communication
interruption.
After the Communication Has Been Restored
1. The marking SysIntErr. (error of system interface) in the SIPROTEC device is set to OFF (logging in the
operational indication log, processing in CFC possible).
2. The data from the telegrams again received by the IO controller is taken over (if permitted by the switching
authority and the interlocking specifications).
If you do not want the switchgear positions of the SIPROTEC devices to be affected after the link between the
IO controller and IO device has been restored, idle state (value "00") must be issued in the associated bit
positions in the output telegram, or the switching authority must be set to (LOCAL).
2.11

Indications to the IO Controller

NOTE
When analyzing the indications of the SIPROTEC device in the IO controller, remember that due to the cycle
time of the PROFINET IO system or the time of cyclic processing within a PLC, temporary changes of the value
of an indication (ON and OFF in one cycle) might not be detected.
This applies to protection indications in particular.
Protection Pickup
Protection indications which signal a "protection pickup" status also only apply for the time during which the
protection pickup applies.
Protection Trip
The parameter Minimum duration of trip command (parameter address = 210) allows you to set the
minimum trip-command duration.
This time applies to all protection functions that can initiate tripping.
The associated protection indications transmit the value ON after occurrence of a protection trip for the set
minimum duration.
52 SIPROTEC 4, Communication Module PROFINET IO, Communication Profile
C53000-L1840-C360-1, Edition 08.2012