Rockwell-automation 1769-HSC Compact High Speed Counter Module Instrukcja Użytkownika Pobierz pdf (Strona 43)

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 43

Module Operation Chapter 2

Program to Fault Enable (PFE)

The ProgToFaultEn bit lets you select which data value (Program Value or Fault

Value) to apply to the output when the Output State Logic state Prog_HLS

changes to indicate Fault_HLS.

If PFE is 0, the module leaves the Program value applied. If PFE is set to 1, the

Fault value is applied.

The module’s Default Safe State configuration is all zeros, resulting in the

following:

• Program State = UDSS

• Program Value = OFF

• Program State Run = No

• Fault State = UDSS

• Fault Value = OFF

• Fault State Run = No

• PFE = leave program value applied

Output Control Example

The following example illustrates the module’s output control flow. The

following conditions are reflected in the

Output Control Example on page 44:

• Range 0 is enabled and active.

• Range 1 is disabled.

• Range 2 is enabled but not active.

• An overcurrent condition exists on real output 3.

• OvercurrentLatchOff is set.

• The system is in Run mode.

TIP

If the module is in a safe state such as Program or Fault which is

configured to turn an output ON and excessive current is drawn from the

output, the output will still turn off according to the programmed

OverCurrentLatchOff bit configuration.

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Rockwell-automation 1769-HSC Compact High Speed Counter Module Instrukcja Użytkownika Strona 43