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High-speed Counters
Section 5-1
When the High-speed Counter Gate Bit is turned OFF again, the high-speed
counter will resume counting and the counter PV will be refreshed.
Restrictions
• The Gate Bit will be disabled if the high-speed counter's reset method is
set to Phase-Z Software reset and the Reset Bit is ON (waiting
for the phase-Z input to reset the counter PV.)
High-speed Counter Frequency Measurement
This function measures the frequency of the high-speed counter (input
pulses.)
The input pulse frequency can be read by executing the PRV(881) instruction.
The measured frequency is output in 8-digit hexadecimal and expressed in
Hz. The frequency measurement function can be used with high-speed
counter 0 only.
The frequency can be measured while a high-speed counter 0 comparison
operation is in progress. Frequency measurement can be performed at the
same time as functions such as the high-speed counter and pulse output with-
out affecting the performance of those functions.
Procedure
1,2,3...
1.
High-speed Counter Enable/Disable Setting (Required)
Select the
Use high speed counter 0
Option in the PLC Setup.
2.
Pulse Input Mode Setting (Required)
Set the High-speed Counter 0 Pulse Input Mode (
Input Setting
) in the PLC
Setup.
3.
Counting Mode Setting (Required)
Set the High-speed Counter 0
Counting Mode
in the PLC Setup.
If ring mode counting is selected, set the High-speed Counter 0
Circular
Max. Count
(max. ring count) in the PLC Setup.
4.
Reset Method Setting (Required)
Set the High-speed Counter 0 Reset Method in the PLC Setup.
5.
PRV(881) Instruction Execution (Required)
N: Specify the high-speed counter number. (High-speed counter 0: 0010)
C: 0003 (Read frequency)
D: Destination word for frequency data
Restrictions
• The frequency measurement function can be used with high-speed
counter 0 only.
Specifications
Item
Specifications
Number of frequency
measurement inputs
1 input (high-speed counter 0 only)
Frequency measurement
range
High-speed counter 0:
Differential phase inputs: 0 to 50 kHz
All other input modes: 0 to 100 kHz
Note:
If the frequency exceeds the maximum value, the
maximum value will be stored.
Measurement method
Execution of the PRV(881) instruction
Output data range
Units: Hz
Range:
Differential phase input: 0000 0000 to 0003 0D40 hex
(Y models: 0000 0000 to 0007 A120 hex)
All other input modes: 0000 0000 to 0001 86A0 hex
(Y models: 0000 0000 to 000F 4240 hex)
Summary of Contents for CP1L CPU UNIT - 03-2009
Page 1: ...Cat No W462 E1 06 CP1L CPU Unit SYSMAC CP Series CP1L L_0D_ CP1L M_0D_ OPERATION MANUAL...
Page 2: ......
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 70: ...36 Function Blocks Section 1 5...
Page 584: ...550 Trouble Shooting Section 8 7...
Page 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 630: ...596 Sample Application Section 9 12...
Page 654: ...620 Troubleshooting Unit Errors Section 11 4...
Page 662: ...628 Replacing User serviceable Parts Section 12 2...
Page 668: ...634 Standard Models Appendix A...
Page 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Page 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Page 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Page 806: ...772 Index...
Page 808: ...774 Revision History...