Parameter Limits For Period Duration And Minimum On Duration; Minimum Period Duration Pd; Minimum Contact Closing Time Me; Minimum On Duration = Minimum Off Duration - Eaton easyE4 series Manual

If you wish to control the pulse duration with a signed value you will have to normalize
this value first of all with an LS value scaling function block.
If the actual value specified via SV for the pulse duration is shorter than the minimum on
duration, the output at Q1 or Q2 is accordingly 0. The status of the PW..E1 contact must
be observed.
If the off duration of the pulse at the output is less than the minimum off duration, Q1 or
Q2 are permanently on. The status of the PW..E1 contact must be observed.

Parameter limits for period duration and minimum ON duration

Table 63: Parameter limit values for period duration and minimum on duration
Base device
EASY-E4-UC-...
EASY-E4-DC-...
EASY-E4-AC-...

Minimum period duration PD

The minimum period duration is 5 ms.

Minimum contact closing time ME

The minimum on duration is limited to zz (100) µs when a very low manipulated variable
is set at input SV.

Minimum on duration = Minimum off duration

The above hardware restriction also applies to the minimum off duration if a very high
manipulated variable at input SV generates a correspondingly long pulse duration. If a
large mark-space ratio of this kind is almost as long as the period duration, the min-
imum off duration is 100 µs.
If the duration is below the set minimum on duration or minimum off duration, the
Boolean control output E1 is set to 1. This control output E1 is used for monitoring during
commissioning and does not have to be connected.
easyE4 11/18 MN050009 EN www.eaton.com
6.1 Manufacturer function blocks
Period dur- Minimum On
ation [ms] duration [ms]
Min. zz Min. zz
Max. 65535 Max. 65535
Min. zz Min. zz
Max. 65535 Max. 65535
Min. zz Min. zz
Max. 65535 Max. 65535
6. Function blocks
Note
Period duration
When the value is
0, no pulses are out-
put at Q1 and Q2.
minimum contact
closing time
Can be selected
within the valid lim-
its
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