3 Memory Allocations
3 - 8
CJ-series EtherCAT Slave Units Operation Manual (W541)
2 Input Data Valid Unit ON:
Indicates that the Unit is processing transmit by process
data communication. Data is valid and usable for con-
trol.
OFF:
Indicates that the Unit is not processing transmit by pro-
cess data communication. Data is invalid and unusable
for control.
Default: OFF
This bit will remain ON while the Unit is in Safe-Opera-
tional state or Operational state. This bit will also remain
ON if the IN port link is not established with another
device. Refer to A-2 Programming Example To Detect
Valid I/O Process Data on page A-8 for a programming
example to check validity of input data.
3 Output Data Valid Unit ON:
Indicates that the Unit is processing receive by process
data communication. Data is valid and usable for con-
trol.
OFF:
Indicates that the Unit is not processing receive by pro-
cess data communication. Data is invalid and unusable
for control.
Default: OFF
This bit will remain ON while the Unit is in Operational
state. This bit will also remain ON if the IN port link is
not established with another device. Refer to A-2 Pro-
gramming Example To Detect Valid I/O Process Data
on page A-8 for a programming example to check valid-
ity of output data.
4 to 13 Reserved --- ---
14 IN Port Link Status Unit ON:
Indicates when a link on the IN port is established with
another device.
OFF:
Indicates when a link on the IN port is not established
with another device.
Default: OFF
15 OUT Port Link Status Unit ON:
Indicates when a link on the OUT port is established
with another device.
OFF:
Indicates when a link on the OUT port is not established
with another device.
Default: OFF
Bit Name Manipulated by Unit operation
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