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8 PROGRAMMING
8 PROGRAMMING
This chapter describes programs of the QD72(E/D).
When applying any of the program examples introduced in this chapter to the actual
system, verify the applicability and confirm that no problem occurs in the system
control.
8.1 Using Programs in Normal System Configuration
This section describes program examples based on the following system configuration
and conditions.
(1) System configuration
(2) Setting conditions of the intelligent function module switch
(3) Program conditions
Programs that were used in earlier products such as A1SD62(E/D/D-S1) cannot be
used because the I/O signals and the buffer memory configuration of these
products differ from those of QD62(E/D). The conventional dedicated instructions
cannot be used.
8 - 1
QD62
(X/Y0 to X/YF)
Set the pulse input mode, counting speed setting, and counter format with the
intelligent function module switch on GX Developer. (See Section 4.5.)
Channel
Pulse input mode
CH1
2-phase multiple of 1
This program uses QD62 to perform counting with the conditions listed below.
Item
Preset value
Coincidence output point No. 1
Ring counter minimum value
Ring counter maximum value
Sampling time setting
2
Periodic pulse time setting
1 Set only when a ring counter function is used
2 Set only when the sampling counter function is used
3 Set only when the periodic pulse counter function is used
POINT
QX10 (X10 to X1F)
QY10 (Y20 to Y2F)
Counting speed setting
200 kPPS
1
1
3
MELSEC-Q
Counter format
User setting
8
Setting value
2500
1000
–5000
5000
10000 ms
5000 ms
8 - 1
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