TransCore MPRX, System Manual

Page: 102 / 208

MPRX Reader
TransCore Proprietary 7–15
An ASCII string from 1 to 20 characters in length
520 Display Power Fail Bit
Command #520 displays the value of the reader power fail bit. The power fail bit changes
from 0 to 1 when power to the reader is interrupted. To reset the bit, use command #63
Reset Reader or command #65 Reset Power Fail Bit. On initial power-up, the host should
transmit one of these two commands to clear the power fail bit.
Reader response:
PWRB P<0 to 1> R0
where
P0
No power failure detected
P1
Power failure detected
R0
Not applicable to the MPRX
521 Display Reader ID Number
Command #521 displays the reader ID that is sent in the auxiliary data field. Reader
response:
RDID xx
where xx = 01 to FF (hexadecimal)
522 Display Communications Port Parameters
Command
#522
displays the selected communications port parameters, including the baud
rate (
#100N
), the number of stop bits (
#101N
), the parity scheme (
#102N
), and the end-of-
line delay.
Reader response:
MAIN B<2 to 7> S<0 to 1> P<0 to 2> D0
where
B2
1200 baud
B3
2400 baud
B4
4800 baud
B5
9600 baud (factory default)
B6
19.2 kbps
B7
38.4 kbps
S0
one stop bit (factory default)
S1
two stop bits