MTS 85X Damper - Manual (Page 16)

Damper System Operation 16
Interlocks
Introduction
Interlocks
The test controller incorporates interlock circuitry that can automatically stop a
test when a system problem, specimen failure, or an operator error could result in
unwanted or unexpected actuator movement. The test controller interlock
circuitry will cause one of two interlocks to occur in response to specific
conditions encountered during testing. These interlocks are:
• Hydraulic Interlock – stops the program and removes hydraulic pressure
from the system.
• Program Interlock – stops the current test program when certain test
parameters are not met or are exceeded.
The following table lists the possible types of interlock conditions for the test
controller.
Condition Cause Type of Interlock
Emergency Stop Emergency Stop or E-Stop button pressed Hydraulic
Program Aux Open circuit at the Prog Intlk rear panel connector Program
Hydraulic event Fault in the performance of hydraulic components Hydraulic
Mechanical event Fault in the performance of mechanical components Hydraulic
End-of Count Completion of a preset number of cycles in the current test
program Hydraulic or
Program
Underpeak Selected signal fails to reach a preset minimum or maximum
level Hydraulic with
indicator option
*
* These interlocks can be set to indicate only. For further information on configuring these interlocks,
refer to the test controller documentation.
Error When the control channel's DC error signal exceeds a preset
maximum level Hydraulic with
indicator option
*
Upper Limit
Lower Limit Transducer feedback signal exceeds a preset minimum or
maximum level Hydraulic with
indicator option
*