5. Sequential Function Chart
9. Special auxiliary relays and special registers: For more details please refer to 5.6 IST
Instruction.
Device Description
M1040 Disabling step transition.
Step transition start. Flag for IST instruction.
M1042 Enabling pulse operation. Flag for IST instruction.
Zero return completed. Flag for IST instruction.
M1044 Zero point condition. Flag for IST instruction.
Disabling “all output reset” function. Flag for IST instruction.
M1046 Indicating STL status. M1046 = ON when any step is ON
D1040 No. of the 1st step point which is ON.
No. of the 2nd step point which is ON
D1042 No. of the 3rd step point which is ON.
No. of the 4th step point which is ON
D1044 No. of the 5th step point which is ON.
No. of the 6th step point which is ON
D1046 No. of the 7th step point which is ON.
No. of the 8th step point which is ON
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