1.5.7 Special D registers function description
The special purpose data register refers to the data register whose purpose has been defined. The special
data registers of the built-in PLC are defined as follows:
PLC signal and system version information
Obtain PLC program capacity information
Current value of time when scanning
Minimum time when scanning
Maximum time during scanning
Monitor if the external input terminal is used
by the PLC program X0~X7, X10~X17
Monitor the external terminals used by the
PLC. (The external terminals used by the
PLC can no longer be used for other
purposes). The read data bits, from the
highest bit to the lowest bit (high left and
low right) correspond to the soft device
number from large to small.
Monitor if the external input terminal is used
by the PLC program X20~X25
Monitor if the external input terminal is used
by the PLC program Y0~Y7,Y10~Y17
Monitor if the external input terminal is used
by the PLC program Y20~Y23
The number of steps in the current PLC
program
Inverter control word
b8~b15: reserved
b7: Inverter emergency stop (MRS)
b6: second function (RT)
b5: High speed (RH)
b4: Medium speed (RM)
b3: Low speed (RL)
b2: Reverse (STR)
b1: Forward rotation (STF)
b0: reserved
Corresponding to the word control of
M8041~8047.
Set the target frequency, the minimum
setting unit is 0.01Hz
AM1-5 terminal analog output (SA3, SF3)
Set the output percentage,
The minimum setting unit is 0.1%, and the
range is 0%~100%.
AM-5 terminal analog output (SE3)
AM2-5 terminal analog output (SA3, SF3)
Set the output percentage,
The minimum setting unit is 0.1%, and the
range is 0%~100%.
Inverter status word monitoring
B15: Tuning
B14: The inverter is about to reset
B11~b13: Keep B10: PLC running
B9: Low voltage
B8: Over voltage
B7: Alarm
B6: Frequency detection
B5: End of parameter restore to default
B4: Overload
B3: Frequency reached
B2: Reverse
B1: Forward
B0: In operation
Output frequency monitoring
Monitor output frequency, unit 0.01Hz