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05/30/2018
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9.3 Data status
With cyclic Real-Time communication the transferred data contains a status message.
Each subslot has its own status information:
IOPS
/
IOCS
.
This status information indicates whether the data are valid =
GOOD
(1) or
invalid =
BAD
(0).
During parameterization, as well as in the boot-up phase the output data can change
to
BAD
for a short time. With a change back to the status
GOOD
a “Return-Of-
Submodule-Alarm” is transferred.
In the case of a diagnostic alarm the status is also set to
BAD
, but can be reset only
with a re-start.
Example: Input data IO-Device --> IO-Controller
VLAN Ethertype Frame-ID
Data
IOPS
...
IOPS
...
Cycle
Data Status
Transfer Status
CRC
4
0x8892
2
1..
1
1
2
1
1
4
Example: Output data IO-Controller --> IO-Device
VLAN Ethertype Frame-ID IOCS
IOC
S
... Data
IOPS
...
Data ...IOPS. Cycle Data Status Transfer Status CRC
4
0x8892
2
1..
1
1 ...
1..
2
1
1
4
9.4 Return of Submodule Alarm
By the measuring system a so-called “Return-of-Submodule-Alarm” is reported if
● the measuring system for a specific input element can provide valid data again
and in which it is not necessary to execute a new parameterization
● or if an output element can process the received data again.
In this case the status for the measuring system (submodule) IOPS/IOCS changes
from the condition “BAD” to “GOOD”.
