Hitachi SJ Series, User Manual

Page: 444 / 786

12-24-13
Chapter 12 About the inverter function
12.24.6 Checking the number of input
pulses
• I want to use the pulse string input to count the
pulses for outputting.
• For the pulse counting function, the terminal input
monitoring mode and the phase coefficient
monitoring mode are available.
• When the "Selection of targets for pulse string input
detection [CA-90]" ranges from 00 to 02, the
terminal input monitoring mode becomes valid.
When [CA-90] is set to "03 (pulse count)," the
phase coefficient monitoring mode becomes valid.
• You can monitor the acquired pulses with the pulse
counter monitor served as an accumulation
counter.
• By turning on [PCC] (Clearing of pulse counter),
you can clear the accumulated counter value.
Parameters
• The maximum input pulse in the phase coefficient
monitoring mode becomes a maximum of 32 kpps.
(When the duty ratio is approximately 50%)
• An accumulation counter value cannot be stored.
After the power supply is turned on, the value
becomes zero.
• The maximum input pulse in the terminal input
monitoring mode depends on the settings of the
input terminal response functions [CA-41] to
[CA-51].
Item Parameter Data Description
Input terminal function [CA-01]~[CA-11]
103 [PLA]: Accepts a pulse input.
104 [PLB]: Accepts a pulse input.
097 [PCC]: Clears the integrated value.
Output terminal function [CC-01]~[CC-07] 091
[PCMP]: Outputs pulse
compare-match signals.
Selection of targets for
pulse string input
detection
[CA-90]
00 PCNT function
01 Instruction
02 Speed feedback
03 Pulse count
Pulse count
compare-match output
ON level
[CA-97] 0~65535
When the number of pulses reaches
this set value, Turn on [PCMP].
Pulse count
compare-match output
OFF level
[CA-98] 0~65535
When the number of pulses reaches
this set value, Turn off [PCMP].
Maximum value for pulse
count compare-match
output
[CA-99] 0~65535
A one-shot pulse can be achieved
when the value is 0.
When the number of pulses reaches
the set value, the internal counter is
cleared.
Pulse counter monitor [dA-28] 0~2147483647 Displays the counter integrated value.
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