Eaton ELC-PB, Programming Manual

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3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-159
API Mnemonic Operands Function
58 PWM
S
1
, S
2
, D
Pulse Width Modulation
Bit Devices Word devices Program Steps
Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
S
1
* * * * * * * * * * *
S
2
* * * * * * * * * * *
D *
PWM: 7 steps
ELC ELCB ELCM
PB PC/PA/PH PV PB PH/PA
32 16 P 32 16 P 32 16 P 32 16 P 32 16 P
Operands:
S
1
: Pulse output width
S
2
: Pulse output period
D
: Pulse output address
Description:
1.
S
1
is the pulse output width with a range of 0~32,767ms.
S
2
is specified as pulse output
period with a range of 1~32,767ms, where
S
1
≦
S
2
.
2.
D
for all ELC controllers:
ELC ELC-PB/PC/PA/PH, ELCB-PB ELC-PV ELCM-PH/PA
Output point Y1 Y0, Y2, Y4, Y6 Y1, Y3
3. For the ELC-PB, ELCB-PB models, The output specified in
D
cannot be the same as the
output used in a PLSY or PLSR instruction. The PWM instruction can only be used once in the
program.
4. When several pulse output instructions (PLSY, PWM, PLSR) use Y1 (ELC-PC/PA/PH), Y0, Y2,
Y4, Y6 (ELC-PV), Y1 or Y3 (ELCM-PH/PA) as the output address in the same scan cycle, the
ELC will perform the instruction which is executed first.
5. When
S
1
≦
0,
S
2
≦
0 or
S
1
＞
S
2
, the ELC controller will fault (M1067 and M1068 will not be ON)
and no output will be generated from the pulse output instruction.. When
S
1
=
S
2
, the pulse
output device will be ON continuously.
6.
S
1
,
S
2
can be changed during the execution of PWM instruction.
7. For ELC-PC/PA/PH, ELCM-PH/PA series, when M1070 = ON, the units for the output pulses
sent to Y1 are 100 μ s. When M1070 = OFF, the units are 1ms. When M1071 = ON, the units for
the output pulses sent to Y3 are 100 μ s. When M1070 = OFF, the units are 1ms.
8. For ELC-PV series, setting the time units for CH0 is determined by the contents of D1371.
Setting the time units for CH1 is determined by the contents of D1372.
9. For ELC-PC/PA/PH/PV, ELCM-PH/PA series, there is no limit on the number of times this
instruction can be used in the program. For ELC-PV series, four instructions are allowed to be
executed at the same time. For ELCM-PH/PA series, two instructions are allowed to be
executed at the same time.