ABB SPAC 531 C User Manual And Technical Description page 132

Settings
6
The setting values are shown by the three
rightmost green digits of the display. The LED
indicator below the setting knob shows, when
Iϕ>/I Start current of stage Iϕ>, expressed as a percentage of the rated current of the
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energized relay input. Setting range 1...10% x I
t> [s] Operate time of stage Iϕ>, expressed in seconds. The setting range is 0.1...1.0 seconds
when SG1/5 = 0, and 1.0...10.0 seconds when SG1/5 = 1.
Iϕ>>/I Start current of stage Iϕ>>, expressed as a percentage of the rated current of the
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energized relay input. The setting range is 5...40% x I
when SG1/6 = 1. Additionally, the setting ∞, infinite (displayed as- - -) can be
x I
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selected, which means that stage Iϕ>> has been set out of function. If the high-set stage
Iϕ>> operates in the reverse direction (SG1/1 = 1), the setting value is negative and
the leftmost digit on the display shows a red minus sign.
t>> [s] Operate time of stage Iϕ>>, expressed in seconds. Setting range 0.1...1.0 seconds.
Further, the checksum of the selector switch-
group SG1 is presented on the display when the
LED indicator under the switchgroup is lit. In
this way the proper operation of the selector
lit, the setting value curently being shown on
the display.
.
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when SG1/6 = 0, and 1...8%
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switches can be verified. An example illustrating
the manual procedure for calculating the
checksum is given in the manual "General char-
acteristics of C type relay modules".