Allen-Bradley 1734-IB8S, Инструкция по установке и эксплуатации, Страница: 90 / 156

90
Rockwell Automation Publication 1734-UM013C-EN-P - August 2010
Chapter 6
Configure the Module in a GuardLogix Controller
A ‘cycle inputs’ required condition occurs when one input terminal goes
from its normal Active->Inactive->Active state while the other input
terminal remains in its normal Active state. Even though no fault is
declared, the inputs must be cycled before the evaluated status of the
inputs can return to the Active state.
But if the channels were in the Active state before going discrepant, and
end up back in the Active state, then there is a ‘cycle input’ required
condition that is
not
declared. The logical state does
not
match the voltage
at the terminals. The channels must be cycled through the Safety state
before returning to the Active state.
3. Assign the Point Mode.
4. Assign the Test Source for each safety input on the module you want pulse
tested.
Choose Description
Not Used The input is disabled. It remains logic 0 if 24V is applied to
the input terminal.
Safety Pulse Test Pulse testing is performed on this input circuit. A test
source on the POINT Guard I/O module
must
be used as
the 24V source for this circuit. The test source is
configured by using the test source pull-down menu. The
pulse test will detect shorts to 24V and channel-to-
channel shorts to other inputs.
Safety A safety input is connected but there is no requirement for
the POINT Guard I/O module to perform a pulse test on this
circuit. An example is a safety device that performs its
own pulse tests on the input wires, such as a light curtain.
Standard A standard device, such as a reset switch, is connected.
This point cannot be used in dual-channel operation.
Choose Description
None If pulse testing is being performed on an input point, then
the test source that is sourcing the 24V for the input circuit
must be selected.
If the incorrect test source is entered, the result is pulse
test failures on that input circuit.
Test Output 0
Test Output 1
(1)
Test Output 2
Test Output 3
(1)
(1) Test Output 1 and 3 incorporate optional muting functionality.