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 terminal Q01 and Q02. The PWM instruction is able to output up to an 8-stage PWM waveform. 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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