Rockwell Automation 2755-DM9, -DM9E High Speed Decoder - Manual (Page 50)

Chapter 4
Configuring Your Decoder
4–23
5) RS422: No flow control is selected.
6) RS422 XON/XOFF: XON/XOFF flow control is selected.
7) RS485 PCCC-1: PCCC Commands, with Write Replies.
8) RS485 PCCC-2: PCCC Commands, Without Write Replies.
9) RS485 ASCII-1: ASCII Commands with Responses.
10) RS485 ASCII-2: ASCII Commands without Responses.
DEVICE ADDRESS (ee) - You must specify an address when you use the
RS-485 LAN. Each device on the network must have a unique address. You
can enter a numeric value in the range of 0 to 31 for the decoder address.
Package Detect Input
INPUT FILTER (ff) - Selecting YES will enable a debounce filter on the
package detect sensor input from the scan head. Any package detect signal
less than 10 msec will be ignored. To trigger the decoder, a continuous
package detect input of at least 20 msec should be provided. The input filter
will be disabled if NO is selected.
Note: When using the package detector as a trigger source and input filter is
enabled, make sure that the detect signal is of long enough duration to allow
for both adequate scanning and 20 msec filter. For example: Assuming you
are using a 800 scan/sec head and you want at least 5 scans, the package
detect must be on for at least 27 msec (20 msec + 5 scans x 1.25 msec/scan).
SENSE (gg) - This field determines whether a package is detected when the
voltage at the package detect input is High or Low. You can select one of
two options:
1) LO = Package Present
2) HI = Package Present