Toshiba SX 2000 - Manual (Page 60)

1.4 Free ASCII mode
CPU register o S2T link port
<Receiving>
Operation:
When the instruction input is ON, one set of message (from start character to
the trailing code) which is received by the link port is read from the receive
buffer, and stored in the CPU registers. The transfer size is fixed to 256
words. The execution status and the message length (in bytes) are stored in
the status flag.
The instruction input must be kept ON until the receiving operation is
complete.
Example:
Source designation Transfer size Destination designation
DOOOO
D0001
HOO H30 D0002 00256 (fixed) D0005 HOO H04 1
00000 D0003 Execution status D0006 00100 1
D0004 Message length
Link port D0100 (CPU register)
When ROOOO is ON, one set of received message is read and stored in
D0100 and after.
Execution status: HOOOO .
H0001 .
H0002 .
H0003 .
H0004 .
.. Normal complete
.. Communication error (parity error, framing error)
.. Message length over (more than 512 bytes)
.. Receive buffer over flow
.. Receive timeout (from start character to the trailing code)
Baudrate Time-out setting
300, 600, 1200 bps 30 seconds
2400 bps 15 seconds
4800 bps 7 seconds
9600 bps 3 seconds
19200 bps 1.5 seconds
Message length: 0......................... No receive message
1 to 512 ... Message length in bytes
Remarks:
The instruction error flag (S0051) comes ON in the following cases, (no
operation)
• The leading address for the link port designation is other than 0.
• Transfer size is other than 256.
• Mode setting of the link port is not the free ASCII mode.
• This instruction is programmed in the sub-program #1.
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