2 Instruction Descriptions
2-742
NJ-series Instructions Reference Manual (W502)
EC_SaveMon
The EC_SaveMon instruction saves EtherCAT communications packet data to an internal file in the
main memory of the CPU Unit.
Only common variables are used.
The EC_SaveMon instruction saves EtherCAT communications packet data that was collected by the
packet monitoring function to an internal file in the main memory of the CPU Unit. The packet monitor
function collects a specified number of the most recent EtherCAT communications packets.
• You cannot execute packet monitoring while this instruction is in execution.
• Refer to the NJ-series CPU Unit Built-in EtherCAT Port User’s Manual (Cat. No. W505) for details on
EtherCAT communications.
• Execution of this instruction is continued until processing is completed even if the value of Execute
changes to FALSE or the execution time exceeds the task period. The value of Done changes to
TRUE when processing is completed. Use this to confirm normal completion of processing.
• Refer to Using this Section on page 2-2 for a timing chart for Execute, Done, Busy, and Error.
• This instruction can be used only for the NJ-series EtherCAT ports.
Instruction Name
FB/
FUN
Graphic expression ST expression
EC_SaveMon Save Ether-
CAT Packets
FB EC_SaveMon_instance(Execute,
Done, Busy, Error, ErrorID);
Variables
Function
Related System-defined Variables
Name Meaning Data type Description
_EC_PktMonStop Packet Monitoring
Stopped
BOOL This variable shows if packet monitoring is stopped.
TRUE: Stopped.
FALSE: Not stopped.
_EC_PktSaving Saving Packet Data
File
BOOL This variable shows if the instruction is saving packet
data in an internal file in the main memory of the CPU
Unit.
TRUE: Saving.
FALSE: Not saving.
Additional Information
Precautions for Correct Use
EC_SaveMon
Execute Done
Busy
Error
ErrorID
EC_SaveMon_instance
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