Mitsubishi Electronics FX5 ユーザーズマニュアル

19  BUILT-IN I/O FUNCTION
19.1  High-speed Counter Function

Multiple point output, high-speed comparison tables cannot execute comparison by setting the parameter alone.
The HIOEN instruction is required to start/stop multiple point output, high-speed comparison tables.
For the HIOEN instruction, refer to MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function 
Blocks).

The HIOEN instruction is required to start/stop high-speed counters as well when using a multiple point 
output, high-speed comparison table.
Measurement is not conducted by starting the multiple point output, high-speed comparison table alone, and 
the high-speed comparison table therefore does not operate.

Precautions

■Setting number

Up to 128 tables can be set.

■Device value when using user device

Parameters and user devices are handled as follows when using user devices.

If D0 is set to initial device

■When final table comparison is complete

When comparison processing has been completed up to the last set table, SM5001 turns ON. The high-speed counter current 
value is not cleared.

■Operation start timing

Multiple point output, high-speed comparison tables are enabled as soon as the HIOEN instruction is executed.

■Table operation interval

The comparison value or input frequency must be set so the comparison value and high-speed counter current value match at 
intervals of 100 

s or more for each table.

■Processing order

Multiple point output, high-speed comparison tables are processed in sequence starting from the first table. Only 1 table per 
count is processed.

■Table setting value update timing

When using user devices, you can change the table setting values by modifying the values of the device. However, the 
comparison value and output data values of the table currently being compared and the next table cannot be changed. If you 
modify the comparison values or output data, you can modify data of the next table in the sequence and those subsequent.
The table number of which the table is being currently compared can be checked in the special register (SD5000).

■Other precautions

There are common precautions when using high-speed counters. For details, refer to Page 163 Precautions when using 
high-speed counters.

Table 1

D1, D0

D3, D2

Table 2

D5, D4

D7, D6

Table 3

D9, D8

D11, D10

Table 4

D13, D12

D15, D14

Table 5

D17, D16

D19, D18