IDEC MICROSmart FC6A Series User Manual page 332

5: F S
UNCTIONS AND ETTINGS
■ Comparison settings
When using the comparison output or the interrupt program as the comparison action for the high-speed counter, configure the
external output number or the label number when there is a match. A maximum of six preset values can be specified for
Number of Comparisons (preset value number 1 to 6).
Tag name
This setting specifies the starting address of the data register region to store the preset values.
Device address
This item shows the address of the data register specified by the tag name.
Number of Comparisons
You can configure a maximum of six preset values (target values) for the comparison action.
Notes:
The preset value becomes active by the END processing in the second scan after the FC6A Series MICROSmart starts operation. Store Preset

Value in the data registers with initialize pulse M8120 input.
When the preset value (special data register) is changed before the comparison, the preset value currently being used for the comparison is

discarded in the program's END processing, and the comparison is performed with the newly configured preset value.
Configure the settings so that an interval of 1 ms or more is present between instances of the preset value and the current value matching.

If this interval is less than 1 ms in length, the next Comparison ON status may be missed.
Output
When a comparison action is selected, these are the external outputs specified for preset value 1 to 6.
The external outputs that can be used as comparison outputs are listed by model as follows. Remote outputs cannot be configured.
Model Number
16-I/O type
24-I/O type
40-I/O type
Plus 16-I/O type
Plus 32-I/O type
Overflow
Select this check box to use overflow in the comparison action conditions (when the current value exceeds 4,294,967,295).
Underflow
Select this check box to use underflow in the comparison action conditions (when the current value falls below 0).
Note: When the comparison action is Comparison Output and either a preset value, overflow, or underflow has been enabled as a comparison
condition, the text box to enter the comparison output is enabled. The comparison output can be specified for each of these match conditions.
■ Keep
After the current value matches the preset value, select to reset the current value to a reset value or to keep the value. Select
this check box to keep the current value.
■ Use HSC Reset Input
Select this check box to reset the current value to the reset value with an external input (high-speed counter reset input).
High-speed counter reset input can only be specified for group 1, group 3 (Plus 32-I/O type), and group 5.
Group
Group 1
Group 3
Group 5
*1 The All-in-One CPU module and Plus 16-I/O type support only reset input by special internal relay.
The Plus 32-I/O type can use I13 as an external reset input.
When the high-speed counter reset input is turned on, the current value is reset to the reset value.
If the high-speed counter reset input is not used, I2, I13, and I5 are normal inputs.
■ Keep current values at power on
Select this check box to maintain the current values that have been kept with the backup battery at power on.
If this check box is cleared, the current values are initialized to 0.
5-26
Comparison Output
Q0 to Q6
Q0 to Q11
Q0 to Q17
Q0 to Q7
Q0 to Q17
External Input
I2
*1
I5
FC6A S MICROS
ERIES
U ' M FC9Y-B1722
MART SER S ANUAL