Fieldbus Coupler Status Word; Behaviour Of The Fieldbus Coupler During A Cycle Time Overrun; Table 94: Fieldbus Coupler Status Word - WAGO I/O-SYSTEM 750 Manual

114 Function Description
7.5.3.2

Fieldbus Coupler Status Word

Table 94: Fieldbus Coupler Status Word

D15 D14 D13 D12 D11 D10
X
Bit
DIAG_PRESENT
D14 ... D4
OUTDISACK
FREEZEACK
SYNCACK
OVRRUN
7.5.3.3

Behaviour of the Fieldbus Coupler During a Cycle Time Overrun

The process data exchange is implemented by the EtherCAT
specific temporal pattern (EtherCAT
requests to process the process data from the EtherCAT
pattern. Upon receipt of a request, the fieldbus coupler implements a
communication cycle with the I/O modules. The output process data are
transmitted to the I/O modules and the input process data are read from the I/O
modules in this communication cycle. The duration of the communication cycle is
determined by the number and type of the I/O modules.
A cycle time overrun occurs when the EtherCAT
process data exchange before the fieldbus coupler has completed the
communication cycle with the I/O modules. The fieldbus coupler behaves as
follows during a cycle time overrun:
Manual
Version 1.2.1
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
Fieldbus Coupler Status Word
High-byte
D9
X X X X X
Function
This bit indicates the occurrence of a diagnostic event in object 0x10F3.
0: There is no diagnostic event.
1: Object 0x10F3 contains at least one diagnostic event.
This bit field may not be evaluated by the EtherCAT
This bit is the fieldbus coupler's acknowledgement for the OUTDIS bit in the fieldbus coupler control
word.

0: The EtherCAT master's output process data have been forwarded to the I/O modules.
1: The fieldbus coupler recognized the OUTDIS request and maintains the I/O module's output process
data at the value of "0".
This bit is the fieldbus coupler's acknowledgement for the FREEZE bit in the fieldbus coupler control
word.
0: The I/O module's input process data have been forwarded to the EtherCAT
1: The fieldbus coupler has recognized the FREEZE request and maintains the input process data at the
last value read from the I/O modules.
This bit is the fieldbus coupler's acknowledgement for the SYNC but in the fieldbus coupler control word.
0: The EtherCAT  master's output process data have been forwarded to the I/O modules.
1: The fieldbus coupler has recognized the SYNC request and maintains the output process data at the
last value received from the EtherCAT
This bit reports a cycle time overrun to the EtherCAT
fieldbus coupler cannot end the internal processing of the process data before an additional process
data cycle is implemented by the EtherCAT
restarted with every initiation of a cycle time overrun.
0: The internal process data processing could be completed within an EtherCAT
the reporting of the cycle time overrun is switched off.
1: The fieldbus couplers internal process data processing could not be completed within an EtherCAT
process data cycle.
WAGO-I/O-SYSTEM 750
D8 D7 D6 D5
X X X X

master.

master.

master. A cycle time overrun occurs when the

master. The bit is set for at least 1000 ms. This time is

cycle time). The fieldbus coupler receives


master requests an additional
Reset Value: 0x0000
Low-byte
D4 D3 D2 D1 D0
X

master.

process data cycle or

master in a
switch in this temporal
