4. COMMUNICATION PROTOCOL
IMSRM04-E8
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4.2 Selecting
Selecting is an operation in which the host computer selects one set from among the devices multi-
drop connected and then of recommending data receive. The selecting procedure is as follows. As
this device employs fast selecting, data is sent continuously to the selected address.
Selecting procedure
4.2.1 Selecting procedure
(1) Data link initialize
Send [EOT] from the host computer to initialize the data link before sending the selecting sequence.
(2) Selecting sequence send
Send the selecting address for the selecting sequence from the host computer.
Address
This is the unit address of this device to be selected.
It is expressed by a 4-digit decimal ASCII code.
When the connection is directly to the control unit and not to the operation panel, the operation panel
address number is abbreviated into 2 digits.
[ ID ]
SR Mini SYSTEM send
Host
computer
send
Host computer send
[ Data ]
[ BCC ]
(1)
(2)
(5)
(3)
(4)
(6)
[Address]
No response
E
O
T
S
T
X
A
C
K
N
A
K
E
T
X
(7)
E
O
T
0
0
0
0
Control unit address number (2 digits)
Operation panel address number (2 digits)
or
→
→
→
→
→
→
←
←
ID: Identifier
E
T
B
