Omron 3G3MV-PDRT2, User Manual

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Chapter 9
9-16
Communications Programs (CS-series PLCs)
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Operation
1.When the Program Start Input Bit is turned ON, the Program Execution Input Bit will be set to self-
holding and the Frequency Reference Write Flag will be turned ON. When the Frequency Refer-
ence Write Flag is ON, the frequency reference data in D01000 will be transferred to the Inverter.
When the Frequency Reference Write Completed Flag is turned ON, the Frequency Reference
Write Flag will be turned OFF and the Control Input Write Flag will be turned ON. (Bits are shifted
to achieve this.)
2.When the Control Input Write Flag is turned ON, the Inverter control input specified in word 0010
will be transferred to the Inverter. When the Control Input Write Completed Flag is turned ON, the
Control Input Write Flag will be turned OFF and the Output Frequency Reference Read Flag will
be turned ON. (Bits are shifted to achieve this.)
3.When the Output Frequency Read Flag is turned ON, the output frequency of the Inverter will be
read. When the Output Frequency Read Completed Flag is turned ON, the read output frequency
will be stored in D02000, the Output Frequency Read Flag will be turned OFF, and the Inverter
Status Read Flag will be turned ON. (Bits are shifted to achieve this.)
4.When the Inverter Status Read Flag is turned ON, the Inverter status will be read. When the In-
verter Status Read Completed Flag is turned ON, the read Inverter status will be transferred to
word 0020, the Inverter Status Read Flag will be turned OFF, and the Frequency Reference Write
Flag will be turned ON. Setting the Frequency Reference Write Flag to ON will repeat the above
steps 1 to 4.
5.When the Program End Input Bit is turned ON, the Inverter stop command will be written in the
Inverter. (When word m bit 7 turns ON, communications errors will be detected and the Commu-
nications Error Flag will be turned ON and will be self-holding. While this flag remains ON, the sys-
tem will perform the same processing as when the Program End Input Bit is turned ON. When the
Communications Error Reset Input Bit is turned ON, the self-holding state will be cleared.)