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29 PRECAUTIONS ON PROGRAMMING
29.1 Instructions Not Available in Redundant System
29
PRECAUTIONS ON PROGRAMMING
This chapter describes the precautions on programming for a redundant system.
29.1
Instructions Not Available in Redundant System
This section describes the instructions not available in a redundant system.
Instructions that cause stop errors
Do not use the following instructions in backup mode. Doing so causes an error when the operating status of the CPU module
is changed from STOP to RUN.
Classification
Instruction symbol
Special counter instructions
Counting up or down the current value (1-phase input)
UDCNT1
Counting up or down the current value (2-phase input)
UDCNT2
Special timer instructions
Teaching timer
TTMR
Special function timer
STMR
Shortcut control instruction
Rotary table shortest direction control
ROTC
Ramp signal instruction
Ramp signal
RAMPQ
Pulse related instructions
Measuring the density of pulses
SPD
Outputting pulses at regular intervals
PLSY
Performing the pulse width modulation
PWM
Matrix input instruction
Matrix input
MTR
Multiple CPU dedicated instructions
Reading device data from another CPU module
D.DDRD
DP.DDRD
M.DDRD
MP.DDRD
Writing device data to another CPU module
D.DDWR
DP.DDWR
M.DDWR
MP.DDWR
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
Page 1027: ......