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Programless Communications Section 5-1
The bit corresponding to the unit number will turn ON if an error occurred in
communications during programless downloading or programless uploading.
The status ON/OFF conditions are listed in the following table.
■ Examples:
Bit 15 Turns ON.
This indicates that a communications error has occurred for Unit No. 15.
Communications
Protocols and
Memory Allocation
For the EJ1 to communicate with the PLC, the Programless Communications
Protocol must be set and the area in PLC memory that will be allocated to
parameters for the Programless Upload/Download Settings must be set.
• The communications protocol is set under Programless Communications
Protocol.
• Select the type of memory area under Programless Communications
Upload/Download Data Area and set the start address for the memory
allocation in the Programless Communications Upload/Download Start
Address.
■ Programless Communications Protocol (Variable Type: F0/B0)
Used to set the programless communications protocol.
Note Reset the EJ1 to enable settings.
ON At least one error occurred.
OFF Normal communications occurred 22 times in a row.
Variable type Parameter name Setting/Monitor values Default
F0/B0 Programless Communica-
tions Protocol (Common)
0: Not used.
1: Not used.
2: NT Link (1:N)
Connectable PLCs:
SYSMAC CS/CJ Series
3: Not used.
4: Not used.
5: MC protocol (format 5)
Connectable PLCs:
MELSEC-Q/QnAS Series
2
Conditions for use No special conditions
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