808
Serial Communications Instructions Section 3-23
Operand Specifications
Description PMCR(260) will execute the communications sequence specified in C2 using
the logical port specified in bits 12 to 15 of C1 and the physical port specified
in bits 8 to 11 of C1 for the unit address specified in bits 0 to 7 of C1.
If a symbol is specified as the operand for a send message, the number of
send words specified in S and beginning from S+1 will be used as the send
area. If a symbol is specified as the operand for a receive message, receive
data is placed in memory staring with R+1 and the number of words received
is automatically written to R if the transmission is successful.
If the transmission fails, the data (R+1 onward) set before PMCR(260) was
executed will be read from the receive buffer and stored in the R+1 onward
again.
R
to
The m words of data that is
received is stored here.
Number of received words +1
Area C1 C2 S R
CIO Area CIO 0 to CIO 6143
Work Area W0 to W511
Holding Bit Area H0 to H511
Auxiliary Bit Area A0 to A447
A448 to A959
A448 to
A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants Specified
values only
0000 to 03E7
hex
(0 to 999)
#0000 (binary)
Data Registers DR0 to DR15 ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
To Next Page
Loading...
