MTS Series 793 Utility Software - Manual (Page 99)

How to Configure a Read-Only HSM
Read-only HSMs require digital input resources that monitor digital HSM pressure signals. The
HWI Editor application assigns two digital inputs to each read-only HSM.
1. Make sure that the controller has the digital input resources required by the read-only HSM.
2. Click the Controller icon and then click the Miscellaneous tab.
3. Select the # of Read-only HSMs from the drop-down list.
A Read-only HSM icon appears in the navigation pane.
4. (Optional) Click the Read-only HSM icon and change the digital input resource names that
were automatically assigned to the read-only HSM.
Description Item
Name: Specifies the desired resource name. Changing this name
will cause file conflicts. Read-only HSM icon
Connector: use this field to annotate the hwi editor file.
On Bit: this is the digital input signal that indicates “low HSM
pressure.” This name must match the resource name of the digital
input.
High Bit: this is the digital input signal that indicates “High HSM
pressure.” This name must match the resource name of the digital
input.
Make sure that the digital input resource name in the On Bit and
High Bit fields matches the physical input used for these signals.
For HSMs that are either on or off (no low pressure setting), make
both the On Bit and High Bit digital input resource name
assignments the same.
Read-Only HSM Control Logic
Dual input
The following table shows the control logic for systems where different digital inputs are used for
the On Bit and High Bit digital input resources..
HSM State “High Bit” Digital Input “On Bit” Digital Input
HSM Off Low Low
High HSM Pressure High Low
Low HSM Pressure Low High
MTS Series 793 Utility Software 85
HWI Hardware Settings