1/01 UDC3300 Limit Controller Product Manual 41
4.5 Communications Set Up Group, Continued
Communications
group prompts,
continued
Table 4-4 Communications Group Definitions, Continued
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
DUPLEX
(RS422/485 only)
HALF
FULL
DUPLEX —Transmission Type
HALF DUPLEX—Two wires
FULL DUPLEX—Four wires
TX DELAY
(RS422/485 only)
1 to 500 milliseconds TX DELAY—Configurable response-delay timer allows
you to force the UDC to delay its response for a time
period of from 1 to 500 milliseconds compatible with the
host system hardware/software.
LOOPBACK
ENABLE
DISABL
LOCAL LOOPBACK tests the communications hardware.
ENABLE—Allows loopback test. The UDC goes into
Loopback mode in which it sends and receives its own
message. The UDC displays “PASS” or “FAIL” in the
upper display and “LOOPTEST” in the lower display as
long as the test is running. The UDC will go into manual
mode. The test will run until the operator disables it here.
DISABLE—disables the Loopback test.
UNITS
PERCNT
ENG
COMMUNICATION UNITS—This selection determines
how the controller values are expressed during
communications.
PERCENT OF SPAN
ENGINEERING UNITS
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