Alarms function, Relay trouble alarms, Alarms function -27 – Basler Electric BE1-700 User Manual

Page 159: Relay trouble alarms -27

Advertising
background image

New Events Counter

The new events counter tracks how many new entries have been logged to the SER since the new events
counter was reset to zero. After SER information is checked, the new events counter can be reset. Then,
the next time that the relay is checked, it is easy to determine if there are new events that have not been
evaluated. One line of an SER directory report contains the new events counter information. The new
events counter is reset by obtaining write access to Reports and using the RS=0 command. The new
events counter can be viewed but not reset at HMI Screen 4.2.

SER Report

A directory of SER reports can be obtained using the RS (report SER) command. Six sub-reports are
available through the RS command: RS-n, RS-Fn, RS-ALM, RS-I/O, RS-LGC, and RS-NEW. These sub-
reports give specific types of data without confusing the user with every internal state change and event
occurrence. Each sub-report is defined in the following paragraphs:

1. RS-n (report SER, number of most recent events)

Events are retrieved for the most recent entries. Entering RS-4 would view an SER report for the last
four events.

2. RS-<n> (report SER, for Fault <event number>)

Events are retrieved for the period specific to a fault event. The report includes all events within the
time span of the fault plus one event before and after the fault. Entering RS-F9 views a SER report
associated with fault record 9.

3. RS-ALM (report SER, alarm)

This command retrieves all alarm events that exist since the last RS=0 command was issued. (RS=0
resets the new records counter to zero.) This information can also be obtained using the RA-SER
command.

4. RS-IO (report SER, input/output)

This command reports all input and output events since the last RS=0 command was issued. (RS=0
resets the new records counter to zero.)

5. RS-LGC (report SER, logic)

A report is retrieved for all logic events since the last RS=0 command was issued. (RS=0 resets the
new records counter to zero.)

6. RS-NEW (report SER, new events since RS=0 reset)

Events are retrieved for the period covered by the New Events Counter register.

ALARMS FUNCTION

The alarms function monitors internal relay systems, external relay interfaces, and power system
equipment. Alarm points are segregated into Relay Trouble Alarms and Programmable Alarms. Alarm
point status is stored in nonvolatile memory and is retained when relay operating power is lost.

The ability to program the reporting and display of alarms along with the automatic display priority feature
of the HMI gives the relay the functionality of a local and remote alarm annunciator. See Section 10,
Human-Machine Interface, for more information on the automatic display priority logic.

Relay Trouble Alarms

All internal circuitry and software that affects how the relay functions is monitored by the continuous self-
test diagnostics function of the relay trouble alarms. A detailed list of relay trouble alarms is provided in
Table 6-16. If any one of these points asserts, the failsafe alarm output relay de-energizes and changes
state of the OUTA contact, the HMI Relay Trouble LED lights, all output relays are disabled, logic variable
ALMREL is set, and the relay is taken offline. The relay trouble alarms function is not programmable.

If you have a relay with a normally closed alarm contact but require a normally open contact, use
BESTlogic to program the output logic. One of the output relays with normally open contacts (OUT1
through OUT5) can be programmed to be held closed. For example, to open OUT5 for indication of relay
trouble, set the VO5 logic expression at /0 (SL-VO5=/0). A not zero setting is equal to logic 1. When the

9376700990 Rev M

BE1-700 Reporting and Alarm Functions

6-27

Advertising
This manual is related to the following products: