IDEC MicroSmart - Manual (Page 150)

5: S PECIAL F UNCTIONS
5-30 « FC4A M ICRO S MART U SER ’ S M ANUAL »
Analog Potentiometers
The all-in-one 10- and 16-I/O type CPU modules and every slim type CPU module have one analog potentiometer. Only
the 24-I/O type CPU module has two analog potentiometers. The values (0 through 255) set with analog potentiometers 1
and 2 are stored to data registers D8057 and D8058, respectively, and updated in every scan.
The analog potentiometer can be used to change the preset value for a timer or counter.
Special Data Registers for Analog Potentiometers
Example: Changing Counter Preset Value Using Analog Potentiometer
This example demonstrates a program to change a counter preset value using analog potentiometer 1.
CPU Module Analog Potentiometer 1 Analog Potentiometer 2
FC4A-C24R2 and FC4A-C24R2C D8057 D8058
Other CPU Modules D8057 —
Analog Potentiometer 1
Analog Potentiometer 2
(24-I/O Type Only)
All-in-One Type CPU Module
Slim Type CPU Module
Analog Potentiometer 1
CNT C0
D8057
I1
Reset
Pulse
I0
Analog potentiometer 1 value is stored to data register D8057, which is used as a preset
value for counter C0.
The preset value is changed between 0 and 255 using the potentiometer.