4. Functions
CNT32-4MT(LPCI)
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4.
Functions
This chapter describes the functions of the CNT32-4MT(LPCI).
Types and Operations of Pulse Signals
Types of pulse signals
The following types of pulse signals (operation modes) can be set.
-
2-phase Input, Synchronous Clear, Multiply by 1
-
2-phase Input, Synchronous Clear, Multiply by 2
-
2-phase Input, Synchronous Clear, Multiply by 4
-
2-phase Input, Asynchronous Clear, Multiply by 1
-
2-phase Input, Asynchronous Clear, Multiply by 2
-
2-phase Input, Asynchronous Clear, Multiply by 4
-
Single-phase Input, Asynchronous Clear, Multiply by 1
-
Single-phase Input, Asynchronous Clear, Multiply by 2
-
Single-phase Input with Gate Control Attached, Asynchronous Clear, Multiply by 1
-
Single-phase Input with Gate Control Attached, Asynchronous Clear, Multiply by 2
2-phase Input
A two-phase pulse input consists of two pulse inputs phase A (advanced signal) and phase B (delayed
signal) with a phase difference of 90
°
.
If the Z phase (reference position signal) is used, the two-phase pulse input can clear the count value to
zero.
0
1
2
* Count operation for incremental counting in the CW direction.
When decremental counting in the CW direction is set, the PC Card performs
decremental counting at the rising edge of the phase-A signal.
* The minimum phase difference between phases-A and B is 25 nsec.
Counting is not performed normally if the phase difference is less than 25 nsec.
Phase-A difference of 25 nsec is required.
Phase-A
(Phase-A/UP)
Phase-B
(Phase-B/DOWN)
Phase-Z
(Phase-Z/CLR)
Count value
Figure 4.1. Example counting during 2-phase input
