Control Keys For Possible Programming - Worth Data 7100 RF Terminal Series Owner's Manual

Base Shut Down
Due to Host Logic
Error
You can re-initialize the terminal by sending *@EOT or by powering the base off and back on.
Automatic Check Back
When a terminal checks back in to see if there is a change in instructions, the host can send back the same prompt or send back a
new prompt. The check back occurs according to the time specified in the Terminal's setup, (specified in increments of 5 sec-
onds). When a check back occurs, the Terminal clears the screen of the current prompt, and sends back the following message:
Base Station Initialized Message
Whenever the Base Station is powered up, it sends a message back to the host as follows:
Since ASCII 19 is XOFF, the ASCII 19 character can be changed to ASCII 20 for XON/XOFF sensitive systems by changing the
Base Station Setup. See
The Base Station Initialized message is provided so that the host will know that there has been a power interruption on the Base
Station. When a serial device powers up, the first byte transmitted is often garbage. QBASIC handles the garbage character with-
out incidence, but GWBASIC does not unless ON ERROR GOTO is used to trap the error. Be aware of this potential garbage-
byte problem in your programming. To isolate and test for the problem, power up the Base without the serial cable connected. Af-
ter you power the Base up, plug in the serial cable. You will not see the "Base Initialized" message but it should not matter when
testing for the garbage data.
If a terminal is signed-on to the system, and the base station is re-initialized, the following message is sent to the terminal:
Base Reinitialized X
Cycle Power on RF
Terminal and Sign-on
again to Restart_
where X is either a P (base initialization was power-related) or H (base initialization was host-related).

Control Keys for Possible Programming

There are some keys on the RF Terminal keypad that when pressed, can transmit special ASCII characters back to the host pro-
gram. This feature might be used by a programmer to allow the operator to review transactions. You can use these keys for spe-
Byte position Function
1 RF Terminal ID
2+ Check Back
Last Termination of message
Byte position Function
1 BASE ID
2+ Base Initialization
Last Termination of message
Chapter 2; RF System Setup
Possible values
0-9,A-Z,a-z,-=
BEL (ASCII 07)
CR (ASCII 13)
Possible values
* (Base ID is fixed)
DC3 (ASCII 19)
CR (ASCII 13)
for details.
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