Chapter 6 FBD Block Diagram Programming
140
PWM function block (only transistor output version)
The transistor output model smart relay includes the capability to provide a PWM (Pulse Width Modulation) output
on te
r
minal Q01 and Q02. The PWM instruction is able to output up to an 8-stage PWM wavefo
r
m. It also provides a
PLSY (Pulse output) output on terminal Q01, whose pulse number and frequency can be changed. The table below
describes number and mode of PWM.
PWM mode
The PWM output terminal Q01 or Q02 can output 8 PWM waveforms. Each PWM has 8 group preset stages which
contents Width and Period. The 8 group preset values can be constant or other function current value.
FBD output coil display
M01: enable input coil
Press “OK” button into
function display
Press “SEL” , “
↑
↓
” and “OK” to
select stage and edit preset value
Display Description
Enable Select3 Select2 Select1 stage PWM Output
P01: PWM code (PWM01~PWM02)
OFF
X
X
X
0
OFF
M01: Enable Input (I01~ B260)
ON OFF OFF OFF 1 Preset
stage
1
N01: Select1 (I01~ B260)
ON
OFF
OFF
ON
2
Preset stage 2
N02: Select2 (I01~ B260)
ON
OFF
ON
OFF
3
Preset stage 3
N03: Select3 (I01~ B260)
ON
OFF
ON
ON
4
Preset stage 4
Mode: PWM mode (1)
ON
ON
OFF
OFF
5
Preset stage 5
SET x: present stages as operating (1~8)
ON
ON
OFF
ON
6
Preset stage 6
Out: Output port (Q01~Q02)
ON
ON
ON
OFF
7
Preset stage 7
TPx: Width of preset stage (0~32767 ms)
ON
ON
ON
ON
8
Preset stage 8
TTx: Period of preset stage (1~32767 ms)
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