48
Byte position
Function
Possible values
1
RF Terminal ID
0-9, A-Z, a-z, - =
2+
Terminal NOT Signed In
DC1(ASCII 17)
Last
Termination of message
CR (ASCII 13)
The ASCII 17 character can be changed to ASCII 16 for XON/XOFF sensitive systems by changing the Base Station Setup. See
Chapter 2
;
RF System Setup
for details.
If the Base Station receives five
Addressing a Terminal not SIGNed On
messages in a row, it transmits the following message
to the Terminal and shuts down: (it will recognize a reinitialize command (*@EOT) from the host though)
Base Shut Down
Due to Host Logic
Error
Check your program for the sequence error before starting again. The host program will have to reinitialize the Base Station or you will
have to cycle power on the Base Station and have the Terminal Sign On again in order to continue.
Sequence Error Message
The host program must observe the one-for-one "host prompt/terminal response" protocol at all times. The host cannot send a
second data entry prompt until it has received a response to the first data entry prompt. If it does, this is considered a
Sequence
Error
. If the Base Station receives a command that is out of sequence, it sends the following message back to the host:
Byte position
Function
Possible values
1
RF Terminal ID
0-9, A-Z, a-z, - =
2+
Sequence Error
DC2 (ASCII 18)
Last
Termination of message
CR (ASCII 13)
If the Base Station receives five
Sequence Error
messages in a row, it transmits the following message to the Terminal and shuts
down: (the only host command that it will receive is *@EOT)
Base Shut Down
Due to Host Logic
Error
Check your program for the sequence error before starting again. You will have to reinitialize the Base Station by host program
control (*@EOT) or manually cycle power on the Base Station and have the Terminal Sign On again in order to continue.
Illegal Command
When a terminal receives an illegal statement from the host, it will display the entire statement on the terminal. Once the ENTER
key is pressed on the terminal, the terminal sends a “?” back to the Base Station.
Byte position
Function
Possible values
1
RF Terminal ID
0-9, A-Z, a-z, - =
2+
Illegal Command
?
Last
Termination of message
CR (ASCII 13)
For example, if Terminal #2 received an illegal command, the Base station would transmit to the host:
2?CR
If a command is sent from the host to the base station without a valid terminal ID character, such as:
@1,1,1,Scan Serial Number
since the command doesn’t specify which terminal it is meant for, the base sends the following message back to the host:
*
?CR
If the Base Station receives more than 1000 characters, it treats that statement as an Illegal Command. If it sees more than 1000
characters five times in a row, it transmits the following message to the Terminal and shuts down:
Содержание 7100 RF Terminal Series
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