Communication protocols
PROGRAMMING MANUAL 213
Revision 1.0
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.
Tes ti ng 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
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