Delta Electronics AH500, Руководство пользователя

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C h a p t e r 1 0 H i g h - s p e e d C o u n t e r s a n d H i g h - s p e e d Ti m e r s

Function block
10.2 High-speed Timers
The setting of high-speed counters is described below.
Mode of measuring time
Number Counter
Device Setting value
External
signal
Storage
device
0 C200 K1SM200 X0.0 C201
1 C204 K1SM204 X0.1 C205
2 C208 K1SM208 X0.2 C209
3 C212 K1SM212
Bit3 Bit2 Bit1 Bit0
-
Enabling
the timer
-
Selecting
a mode
Bit 2: Enabling a timer
Bit 0: (1) 0: General mode (The
interval between the rising edge
of a pulse and the falling edge of
the pulse is measured.)
(2) 1: Cyclic mode (The interval
between the rising edge of a
pulse and the rising edge of the
next pulse is measured.)
X0.3 C213
Example 1: Using C20s in general mode
1. Users have to select the general mode, and enable the timer, that is, they have to write K4 into
K1SM208.
2. C208 is enabled. The interval between the rising edge of a pulse received through X0.2 and the
falling edge of the pulse is measured. The interval is written into C209. (Unit: 0.01
microseconds)
t1
t2
X0.2
t
C209
C209
General mode
Unit: 0.01
μ
s
1 0 - 5