Motorola ACE3600 RTU - Page 97

Digital Input Module
6-4
Event Time Tagging
Each DI can be set in the user application program’s I/O link table to trigger recording of time
tagged events upon any input change of state. The time tagged events are recorded in the CPU
memory and can be retrieved for various purposes.
Keep Last Value (KLV) and Predefined Value (PDV)
Each input can be configured to KLV or to a PDV (0, 1). This value is shown to the user
application program in the event of DI module failure. The PDV can also be used during
normal operation to force a value that masks the actual input value. In this case the user
program will get the PDV instead of the actual input value.
DI Module Configuration Options
The DI module features which can be configured are listed in the table below. Some
parameters are per module and some are per input.
Table 6-1 ACE3600 DI Module Configurable Features
Feature Parameter
Settings
Default Setting Per Module /
Input
Parameter Setup
Location
DC or AC
operation
∗
AC / DC DC Module STS site
configuration
Fast Capture Disabled
/Enabled
Disabled Input STS site
configuration
DI Filter (DC) 0-254 (x 0.2
mS)
50 * 0.2 mS
(=10 mS)
Module STS site
configuration;
‘C’ User Program
Counter Filter
(DC)
0-255 (x 0.05
mS)
20 * 0.2 mS
(= 1 ms)
Module STS site
configuration
‘C’ User Program
Event Time
Tagging
Disabled/
Enabled
Disabled Input User Program I/O
link table
Keep Last Value
and Predefined
Value
KLV/PDV
PDV=0/1
KLV Input User Program I/O
link table
Mask No /Yes No Input User Program I/O
link table
∗
in Fast 24V IEC TYPE II modules –only DC