MTS Series 793 - Manual (Page 311)

1. Ensure that all program sources are off.
2. Set the Integrators Manual State setting to Hold.
3. Shut off hydraulic pressure.
4. Press the Interlock button.
5. Set the Integrators Manual State setting to Disable.
About Read-Only HSMs
A read-only HSM refers to a hydraulic pressure source that is controlled by an external system (or manually)
and monitored by the MTS controller. The read-only HSM state (pressure) is monitored using one or two
dedicated digital inputs. The Hwi Editor application assigns these inputs to the read-only HSM.
How to Apply Hydraulics to a Read-Only HSM Station
1. Ensure that read-only HSM pressure is off (no hydraulic pressure).
Warning:
Any time lag between the time that read-only HSM pressure is applied to a valve and when
the pressure signal is read by the Station Manager application can result in unexpected
actuator movement.
Unexpected actuator movement can result in injury to personnel or damage to the equipment.
Use the Station Manager Manual Command control to zero (or minimize) the error signal
(make sure the error signal is stable) and ensure that all program sources are off before you
start a read-only HSM.
Follow these guidelines to minimize actuator movement when you apply hydraulics to a read-only HSM
station that includes a time lag between the time that read-only HSM pressure is applied to a valve and
when the pressure signal is read by the Station Manager application:
• Clear the actuator area before applying hydraulics.
• Ensure that the read-only HSM pressure is off before loading a station.
2. Move all equipment and personnel out of the actuator area.
3. Load a station.
4. Ensure that all program sources are off and click Reset/Override.
5. Switch the HSM outlet pressure to low pressure and then to high pressure.
MTS Series 793 Control Software 311
Using Station Manager to Run Tests