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Instruction Set
ASCII Instructions
3-49
ASCII instructions continued...
Instruction
Description
ASCII Handshake Lines
AHL
(Enhanced, Ethernet, and
ControlNet PLC-5 processors
only)
If input conditions go from false-to-true, the processor uses the AND and OR masks to
determine whether to set or reset the DTR (bit 0) and RTS (bit 1) lines, or leave them
unchanged. Bit 0 and 1 of the AND mask cause the line(s) to reset if 1 and leave the line(s)
unchanged if 0. BIt 0 and 1 of the OR mask cause the line(s) to set if 1 and leave the line(s)
unchanged if 0.
ASCII Read
ARD
(Enhanced, Ethernet, and
ControlNet PLC-5 processors
only)
Status Bits
EN - Enable
DN - Done Bit
ER - Error Bit
UL - Unload
EM - Empty
EU - Queue
If input conditions go from false-to-true, read 50 characters from the buffer and move them to
ST52:76. The number of characters read is stored in R6:32.POS and displayed in the Characters
Read Field of the instruction display.
ASCII HANDSHAKE LINE
Channel
0
AND Mask
0001
OR Mask
0003
Control
R6:23
Channel Status
AHL
ASCII READ
Channel
0
Dest
ST52:76
Control
R6:32
String Length
50
Characters Read
ARD