24-Bit Counters Quadrature Mode Outputs; Outputs In Quadrature Modes; Carry Toggle Output; Borrow Toggle Output - Siemens SIMATIC TI505 User Manual

1.6

24-Bit Counters Quadrature Mode Outputs

Outputs in
Quadrature
Modes
Carry Toggle
Output
Borrow Toggle
Output
Compare Toggle
Output
Compare Latch
Output
1-12 Product Overview
You can select one of four output options, (see Figure 1-9) for the output
signal of each 24-bit counter (Counter 1, Output 1; and Counter 4, Output
5).
In quadrature counting modes, the internal clocking for the Compare, Carry
and Borrow pulses produce a pulse width insufficient to drive the outputs.
See Figure 1-9. Compare Toggle and Compare Latch are the only signals
that can drive the output circuitry.
The Carry Toggle output changes state when the count overflows. After a
counter reset, the Carry Toggle output is on. Set the output jumper to
Compare.
The Borrow Toggle output changes state when the count underflows. After a
counter reset, the Borrow Toggle output is on. Set the output jumper to
Compare Toggle.
In all module counting modes, the PLC can read the Compare Toggle, Carry
Toggle and Borrow Toggle flags in Status Word WX17. Table 1-1 and
Table 1-2 summarize the active outputs for various counter modes.
The Compare Toggle jumper selects a signal that changes state on the next
count after the count value equals the preset value. This signal appears on
Output 1 (Channel 1) or on Output 5 (Channel 2). After counter reset, the
output signal is on.
The Compare Latch jumper selects a signal that is active when the count
value equals the preset value; the signal remains active until reset by the
PLC or by the second preset (Preset 2 or Preset 6). This signal appears on
Output 1 (Channel 1) or on Output 5 (Channel 2). After counter reset, the
output signal is Off.
High Speed Counter Encoder Module User Manual