Pwm Frq-Cnt; Process Image; Table 35: Process Image (Pwm Frq-Cnt) - WAGO 750 XTR Manual

50 Operating Modes
4.3

PWM Frq-Cnt

In this operating mode, the frequency can vary from 0... 20 kHz via the process
image. The PWM cycles that have already been output are counted via the input
process image. The duty cycle can be preset in the Parameterization dialog. The
default value is "50 %".
Of the 4 channels, two each are corresponding. The first output (DO 1 or DO 3)
outputs the PWM signal and the second (DO 2 or DO 4) the count direction.
The PWM output is started at the rising edge of control bit 1.
To stop, a falling edge must occur at control bit 1.
When the PWM output is restarted, the counting process is continued from the
stopped value.
The frequency of the signal can be changed during the PWM output. An enabled
PWM output is signaled by status bit 1.
The count value can be reset by a rising edge at control bit 2.
4.3.1

Process Image

Table 35: Process Image (PWM Frq-Cnt)

S0
D0
D1
S1
D2
D3
S2
D4
D5
S3
D6
D7
Manual
Version 1.0.0
Process input data
Status byte 0
DO 1 count PWM cycles low
byte
DO 1 count PWM cycles high
byte
Status byte 1
-
-
Status byte 2
DO 3 count PWM cycles low
byte
DO 3 count PWM cycles high
byte
Status byte 3
-
-
WAGO I/O System 750 XTR
750-677/040-000 4PWM 24 VDC 0.2A XTR
Process Image
Process output data
C0
D0
D1 DO1 Frequency high byte
C1
D2
D3
C2
D4
D5 DO3 Frequency high byte
C3
D6
D7
Control byte 0
DO1 Frequency low byte
Control byte 1
-
-
Control byte 2
DO3 Frequency low byte
Control byte 3
-
-