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VM600 MPS hardware manual (standard version) MAMPS-HW/E 4 - 27

Edition 17 - February 2018

Operation of LEDs on MPC4 panel

MPC4 / IOC4T CARD PAIR

4.9.2 Individual status indicator LEDs for measurement channels

Table 4-2 provides detailed information on the behaviour of the MPC4 status indicator LEDs

for the four individual measurement channels.

NOTE: In Table 4-2, events are presented in decreasing order of priority for an

MPC4 / IOC4T card pair (that is, “Off” has the highest priority).

Table 4-2: Behaviour of status indicator LEDs

for individual measurement channels

Behaviour of

measurement channel

status LED

Event(s)

Off

Channel is not configured

MPC4 configuration is not running

Green blinking

Signal input to the channel is not valid

(either the lower or the upper “OK Level” has been exceeded)

Green blinking slowly

(approximately once per

second)

The channel inhibit function is activated for the channel

Red blinking

Note: Applies to dual-channel processing only.

When there is an active dual-channel processing alarm, the status

indicator LED for both channels will blink red at the same time.

For Danger level alarms configured as not latched: indicates that

a signal is below the lower Danger level (D) or above the upper

Danger level (D+). That is, there is a currently active processing alarm.

For Danger level alarms configured as latched: indicates that

a signal was below the lower Danger level (D) or above the upper

Danger level (D+) and was latched but has not yet been reset, or that a

signal is below the lower Danger level or above the upper Danger level.

That is, either there was a previously active processing alarm that has

not been reset or there is a currently active processing alarm.

Red (continuous)

Note: Applies to single-channel processing only.