Worth Data 701 RF manual Base Station Error Feedback, Addressing a Terminal not SIGNed on

Ideally, if the operator is leaving the area (to go to lunch or move to another building) before he is out of range of the network, he should SIGN OUT, then SIGN ON upon his return.

A 6 line display terminal configured as a 6 line display (see Installation and Setup for LCD DISPLAY MODE) sends ASCII 22 as its SIGN ON

character. A 6 line display terminal configured as a 4 line display will transmit the ASCII 15 character for SIGN ON.

SIGN OUT

When a RF Terminal is powered down manually or the user presses the F1 key to exit data entry mode to go to one of the other modes (SETUP or ONE WAY), the host receives the following SIGN OUT message:

Byte position	Function
1	RF Terminal ID
2+	SIGN OUT
Last	Termination of message

Possible values

0-9, A-Z, a-z, - =

SO (ASCII 14)

CR (ASCII 13)

Base Station Error Feedback

The following are four different unexpected feedbacks that the Base Station can send back to your program: (Be sure to look for each of them to be sure your program doesn’t blow up at an unexpected time.)

Addressing a Terminal not SIGNed ON

If the host attempts to send a message to a terminal that is not SIGNed ON, the Base Station sends back the following message to the host computer:

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

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