Command Response Conventions
Like the Encompass 4 Reader commands, responses are preceded by the # character. Many Encompass 4
Reader commands respond with #Done or #Error indicating the command was or was not recognized
and completed. Other commands respond with a four-character identifier followed by one or more values.
Table 16 shows an example of a command/reply sequence. This example assumes that an Encompass
4 Reader with serial number SN97001P running version X.XX software is connected to a PC running a
terminal emulation software package. The command sequence verifies that communications are working
correctly.
Table 16 Sample Command Sequence
Entry Encompass 4 Reader Response
Notes
#01 <CR> #Done <CR/LF>
Switches Encompass
4 Reader to command
mode
#505
<CR>
#Model E4 Series Ver X.XX
SN08001P <CR/LF>
Reports the software
version and serial
number
#00 <CR> #Done <CR/LF>
Returns Encompass 4
Reader to data mode
In command discussions, Encompass 4 Reader response characters may be shown in brackets < >. The
use of brackets indicates that the response is a value in the range of characters. The brackets are not part
of the response. For example, the response to command #520 Display Power Fail Bit is either a
0 or a 1. In the command discussion, the response is shown as:
#PWRB <0-1>
with actual Encompass 4 Reader response being one of the following:
#PWRB 0
#PWRB 1
In this example, PWRB is the four-character identifier for power fail bit, and the 0 or 1 is the value. All
spaces shown in the response are actual spaces sent from the Encompass 4 Reader. In this example, one
space is between the letter B and the number.
Encompass 4 Reader System Guide
TransCore Proprietary.
5–68
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