MTS Series 311 Load Frame - Manual (Page 83)

Load Unit Addendum Addendum 83
Test System Modes of Operation
There are four operating modes for this test system:
• Hydraulic Power Off
• Specimen Installation and Setup
• Run mode
• Service
Hydraulic power off
Hydraulic Power is prevented from energizing the circuit via the hydraulic
service manifold. Full access to the test area is allowed in this mode.
Specimen installation
and setup
The controller provides a means for creating a specimen installation mode. This
mode typically uses the Channel Limited Channel (CLC) control method. The
primary control channel is Displacement (stroke) with maximum limits set on
applied force. Tuning parameters unique to this mode optimize manual control
during this mode. In addition, a maximum velocity command is set.
The handset has the ability to have a configuration specific desired response to
the thumbwheel encoder on the handset for a precise level of control.
In conjunction with the controller and specimen installation mode using the
handset, the load frame itself has two operation modes, full flow, and actuator
velocity limiting restricted flow. A switch on the load frame control panel
activates a solenoid which controls a hydraulic circuit within the load frame
hydraulic service manifold. In the actuator velocity limiting mode, oil flow to the
actuator is directed through an orifice which limits actuator velocity to 10 mm/
second or less.
7 Connector RJ-45, to Controller.
8 Hydraulic off Shuts down the HPU.
9 Start Starts the test action. Only if the application test software is
active.
10 Interlock reset Resets active interlock(s) providing the cause for the
interlock(s) has been remedied.
11 Thumbwheel enable Press to enable the thumbwheel to position the actuator. Press
again to disable the thumbwheel, Indicator lights when
thumbwheel is active.
12 Fault Indicator. When lit, indicates an active fault or interlock.
13 Handset enable Used to enable/disable the handset. When the indicator is lit,
the handset is enabled for control of the actuator.
14 Select (Enter) Selects the highlighted line in the display.
15 Display Four lines, 20 characters per line.
Handset Controls and Indicators
# Control/Indicator Description