Communication protocols
PROGRAMMING MANUAL
213
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Commands
These Host Link commands are supported for the Host Link Master protocol:
/i
Type
Header code
Name
Function
I/O memory
reading
RR
CIO AREA READ
Reads the specified number of
words beginning with the designated
CIO/IR
word.
RL
LR AREA READ
Reads the specified number of
words beginning with the designated
LR
word.
RH
HR AREA READ
Reads the specified number of
words beginning with the designated
HR
word.
RD
DM AREA READ
Reads the specified number of
words beginning with the designated
DM
word.
RJ
AR AREA READ
Reads the specified number of
words beginning with the designated
AR
word.
RE
EM AREA READ
Reads the specified number of
words beginning with the designated
EM
word.
I/O memory
writing
WR
CIO AREA
WRITE
Writes the specified data in word
units beginning with the designated
CIO/IR
word.
WL
LR AREA WRITE
Writes the specified data in word
units beginning with the designated
LR
word.
WH
HR AREA
WRITE
Writes the specified data in word
units beginning with the designated
HR
word.
WD
DM AREA
WRITE
Writes the specified data in word
units beginning with the designated
DM
word.
WJ
AR AREA
WRITE
Writes the specified data in word
units beginning with the designated
AR
word.
WE
EM AREA
WRITE
Writes the specified data in word
units beginning with the designated
EM
word.
CPU unit
status
SC
STATUS WRITE
Changes the operating mode of the
CPU unit.
Testing
TS
TEST
Returns, unaltered, a single block
that was sent from the master.
PC model
code reading
MM
PC MODEL
READ
Reads the model code of the CPU
unit
Host Link
communica-
tions
processing
XZ
ABORT
(command only)
Aborts the operation that is per-
formed by a Host Link command,
and returns to the initial status.
**
INITIALIZE
(com-
mand only)
Initializes the transfer control proce-
dures for all Host Link units.
IC
Undefined com-
mand (response
only)
This is the response when the com-
mand header code is invalid.
Type
Header code
Name
Function