Mitsubishi Electric MR-D30, Instruction Manual, Page: 86 / 156

4. SAFETY OBSERVATION FUNCTION
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(c) Cautions for executing test pulse diagnosis by multiple devices.
When there are multiple input devices for the test pulse diagnosis, share PLSA/PLSB with those
input devices. A short-circuit failure between wirings sharing PLSA/PLSB cannot be detected with
the test pulse diagnosis. Execute the input device fixing-diagnosis at start-up (refer to section 4.4.1
(4)) in addition.
MR-D30
DC24VA
PLSA
DICOMA
DI1A
CN10A
DC24VB
PLSB
DICOMB
DI1B
CN10B
Switch
DI2B
DI2A
24 V DC
24 V DC
Shorted
Switch
(d) Parameter setting
Set the following parameters for DI1_ to DI6_ which input devices are assigned to with [Pr. PSD02
Input device selection DI1] to [Pr. PSD07 Input device selection DI6].
Parameter Name
PSD24 Input device - Test pulse diagnosis execution selection 1
PSD25 Input device - Test pulse diagnosis execution selection 2
PSD26 Input device - Test pulse off time
Select whether or not to execute the test pulse diagnosis with [Pr. PSD24 Input device - Test pulse
diagnosis execution selection 1] and [Pr. PSD25 Input device - Test pulse diagnosis execution
selection 2]. Set the off-time of test pulses outputted from PLSA and PLSB to [Pr. PSD26 Input
device - Test pulse off time].
The achievable safety level depends on the input devices you use and parameter settings of this
function. Refer to section 4.1 for details.