Maple Systems MAP450D - Manual (Page 4)

Operational Overview
The MAP450D Operator Interface Terminal (OIT) provides the human-machine interface
between an operator and an ASCII compatible computer or host controller. Any
controller that is capable of sending and receiving ASCII characters through a serial port
can potentially communicate to the MAP450D.
The MAP450D receives and sends simple ASCII character strings. It accepts:
• printable ASCII characters — which immediately display on the OIT
• non-printable ASCII control characters (Control Codes) — which directly affect the
OIT’s display
• and special ASCII character combinations (Control Commands).
Control Commands cause the OIT to:
• modify the OIT’s configuration parameters
• echo back text
• poll or clear the OIT’s buffers
• display one of up to 500 predefined messages
• or sound the OIT’s internal buzzer
3 MAP450D Operation Manual
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