Mitsubishi Electric FX5 User Manual page 255

Starting/stopping the counting of the high-speed counter
The start and stop of the counting of the high-speed counter of the UDCNTF instructions and HIOEN/DHIOEN instructions
with the FX3 compatible function valid are described below.
For the UDCNTF instruction or HIOEN/DHIOEN instruction, refer to MELSEC iQ-F FX5 Programming Manual
(Instructions, Standard Functions/Function Blocks).
Starting/stopping the counting of the high-speed counter
The start of the high-speed counter
The simultaneous start of multiple CH
The simultaneous stop of multiple CH
The start→stop and the stop→start of the same CH in one scan
The stop of the counter started by the UDCNTF instructions in the same step
The stop of the counter started by the UDCNTF instructions in a different step
The stop of the counter started by the HIOEN/DHIOEN instruction the same step
The stop of the counter started by the HIOEN/DHIOEN instruction a different step
: Supported
: Not supported
: Not applicable
• If the UDCNTF instructions and HIOEN/DHIOEN instructions are used for the same CH, it is not possible to
use the HIOEN/DHIOEN instruction to stop the high-speed counter started by UDCNTF instructions. On the
other hand, the instruction started by the HIOEN/DHIOEN instruction can be stopped by executing
ON→OFF of UDCNTF instructions. Use caution when the HIOEN/DHIOEN instruction and UDCNTF
instructions are used together.
• Do not drive the same LC device number at the same time.
• Do not duplicate output (double coil) the same LC device number with multiple instructions.
The operation of each element of the current value of a started counter and the LC
device
Shown below is the operations of the SD device, the current value of the LC device, and each element of the LC device when
the counting is started with UDCNTF instructions or is started with the HIOEN/DHIOEN instruction while the FX3 compatible
function is valid.
The current value of the SD device, each element of the LC device
The current value of the SD device
The current value of the LC device
The LC device counting coil
The counter contact point of the LC device
The reset coil of the LC device
: Operate
: Not operate
• When a count is started by HIOEN/DHIOEN instruction, although LC device changes, neither a counting
coil nor the counter contact operates. Moreover, when operation is started by HIOEN/DHIOEN instruction
and LC corresponding to CH is reset, during the RST instruction ON, operation is stopped and calculation
is resumed in OFF of the RST instruction.
UDCNTF instruction








The start with UDCNTF
instruction





24 HIGH-SPEED INPUT/OUTPUT FUNCTION
24.2 FX3-compatible high-speed counter function
HIOEN/DHIOEN instruction








The start with HIOEN/
DHIOEN instruction





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