TransCore MPRX, System Manual

Page: 119 / 208

User Guide
TransCore Proprietary 7–32
Table 7 – 14 Timeout Period Values
Reader response:
Done or Error.
The reader returns an Error message if a valid hexadecimal digit is not substituted for N in
command #693N.
Note: This command only has an effect when the reader is not in MPRX mode.
694N Select Input Inversion Option
Command #694N enables or disables input inversion. When inversion is enabled, an open
circuit input is interpreted as a closed circuit, and a closed circuit input is interpreted as an
open circuit. This feature allows greater flexibility in the attachment of external equipment
to the reader inputs. For example, some proximity sensors indicate presence with an open
circuit. In this instance, command #6941 can enable input inversion so that an open circuit
input indicates a presence. The values for N represent the two inversion options as shown
in
Table 7 – 15 .
Command Timeout (ms)
6930 0 (always expired)
6931 4
6932 8
6933 12
6934 20
6935 24
6936 32
6937 48
6938 60
6939 92
693A 152
693B 300
693C 452
693D 600
693E 752
693F Infinite (never expires,
factory default)