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Custom Control equations (SMPL) are used to monitor the state of the IAM contact and generate a
trouble condition on the front panel annunciator if the contact is closed (i.e., a trouble exists).
The DFSM monitors for the following trouble conditions. Each condition corresponds to an LED
indicator on the card.
DFSM Switch Input. An open circuit on the wiring between TB3 and the key switch causes
a trouble. A short on this circuit is interpreted as switch closure and activates the DFSM.
NAC. An open circuit or a short circuit on the primary or secondary wiring connecting the
master with the slaves causes a trouble.
Power Stage. The entire audio path is supplied a constant AC signal that allows the DFSM
to monitor the audio path and ensure that all components of the audio path are working
correctly.
DFSM ON. Indicates the DFSM is active, and does not indicate a problem with the card.
1. In the FACP programmer, open the job for the panel containing the DFSM card. Locate the
IDNet point associated with the hardware address set on the IAM. Assign the point a Device
Type of IAM and a Point Type of UTILITY.
In the Custom Label field, enter a descriptive label that will indicate that a problem has
occurred with either the IAM or the wiring running between the IAM and the DFSM Trouble
contacts. For example “DFSM IAM or IAM Wiring Trouble”. This label appears on the
front panel LCD and the panel’s trouble LED illuminates only if the IAM fails or an Open
occurs on the wiring running between the IAM and the DFSM trouble contacts.
2. Select a user-defined pseudo point (P512 or higher), and assign it a Trouble Point Type. In the
Custom Label field, enter a descriptive label that will indicate that a DFSM-specific trouble
has occurred. For example, “DFSM -- NAC, Power Stage, or Switch Trouble.” (If this
trouble is displayed on the front panel, check the LED on the DFSM to determine the specific
trouble that has occurred.)
3. Create Custom Control to monitor the state of the IAM and track on the trouble pseudo point
if the IAM turns on (i.e., the Trouble Contacts close). In the following example, M-1-1-0
represents the address configured for the IAM. The actual IDNet point name will reflect the
physical address set on the IAM. In the OUT portion of the equation, P512 is the example
trouble pseudo defined in Step 2 above.
IN:
M1-1-0 ON
OUT:
TRACK P512 ON PRI=9,9 ; Turn on trouble pseudo
END:
1. Click on the Panel tab at the top of the programmer.
2. Click on the System Options subtab, located along the bottom of the window.
3. Locate the AmpAux USAGE pull down list box and choose the Degraded Failsafe Mic
option (see figure 10).
4. Save, build, and download the job. For additional details, refer to the ES Panel
Programmer’s Manual (574-849).
Continued on next page
Programming
Programming IAM
Setting DFSM
System Option