Troubleshooting Procedure; Relay Enabled Front-Panel Led Dark; Cannot See Characters On Relay Front-Panel Display Screen; Relay Does Not Accurately Measure Voltages Or Currents - Siemens SIMPRO-100 Instruction Manual

SIMPRO-100
10.3 Troubleshooting
Procedure
10.3.1 Relay Enabled Front-Panel
LED Dark
Possible Cause
Input power not present
or fuse is blown.
Self-test failure.
Table 10.2 Relay Enabled Front-panel LED Dark
10.3.2 Cannot See Characters on
Relay Front-Panel Display
Screen
Possible Cause
Relay front-panel Press the {ESC} pushbutton to activate
has timed-out display
Relay is Verify input power and fuse continuity
deenergized
Table 10.3 Cannot See Characters on Relay
Front-Panel Display Screen
10.3.3 Relay Does Not Accurately
Measure Voltages or
Currents
Possible Cause
Wiring error.
Incorrect CTR, ITAP, CTRN,
INTAP, or PRT setting.
Voltage neutral terminal
(D09) not properly grounded.
Table 10.4 Relay Does Not Accurately Measure
Voltages or Currents
PRIM-2400C
Solution
Verify input power and fuse
continuity.
Check to see if the ALARM
b-contact is closed. Use the
front-panel Status of Relay
function to view self-test results.
Solution
Solution
Verify input wiring.
Verify signal source ratios,
connections, and associated
settings.
Verify wiring and connections.
Maintenance & Troubleshooting
10.3.4 Relay Does Not Respond
to Commands From Device
Connected to Serial Port
Possible Cause
Communications device
not connected to relay.
Relay or communications
device at incorrect baud
rate or other
communication parameter
incompatibility, including
cabling error.
Relay serial port has
received an XOFF, halting
communications.
Rear-panel serial port
protocol set differently
than expected.
Table 10.5 Relay Does Not Respond to Command
from Device Connected to Serial Port
10.3.5 Relay Does Not Respond
to Faults
Possible Cause
Relay improperly set.
Improper test source
settings.
CT or PT input wiring error. Verify input wiring.
Failed relay self-test.
Table 10.6 Relay Does Not Respond to Faults
10
Solution
Verify cable connections.
Verify terminal setup and cable
pinout.
Type <CTRL> Q to send relay on
XON and restart communications.
®
If you select Modbus protocol,
the rear-panel EIA-232 serial port
is disabled. Use the EIA-485 port
to communicate with the relay
using Modbus, or use the
front-panel EIA-232 port to
communicate with the relay using
ASCII text. See Section 4.8,
page 70 for more information on
serial port configuration.
Solution
Verify relay settings.
Verify test source settings.
Use the front-panel Status of
Relay function to view self-test
results.
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