Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 103)

7–15 Configuration: Scanner Control, Primary Match Table, Discrete I/O
Publication 2755-833
Discrete I/O Parameters
These parameters define conditions that control the discrete outputs.
Each output is defined by four parameters:
•
normal state of an output (O=opened or C=closed)
•
source of the event (Scanner A or B)
•
condition that activates an output
•
duration of pulsed output
•
send Host Message parameter
The discrete outputs can be controlled locally via the configuration
screens or remotely using host commands. The discrete I/O system
can:
•
indicate the success or failure of the decoder to read bar code data
from a package
•
indicate the results of a compare operation between decoded bar
code data and match code data
•
provide external control of the outputs using host commands
•
indicate a buffer full condition (no data lost)
•
indicate a buffer overflow condition
•
load bar code data into the match code table using an external
switch along with an input module
!
ATTENTION: When controlling outputs locally using
configuration screens, suspend host communications to
prevent outputs from unintentionally changing state.
Each discrete I/O parameter is defined below. The options for each
parameter are shown, with the default setting in bold letters.
Output State
Field Type Options
Select
O = Normally Open
C = Normally Closed
Defines the normal state of each discrete output (or input). The
default is O=Normally Opened. To change the state of the output to
C=Normally Closed, select C.