APPENDIX. HOST COMMUNICATION PROTOCOL
IMR02E20-E1
118
A.2.2 Selecting procedures
Selecting is the action where the host computer requests one of the connected SRZ units to receive
data. An example of the selecting procedure is shown below:
Host
computer
send
[ ]
SRZ unit send
Host computer send
[Data]
[BCC]
(1)
(2)
(5)
(3)
(4)
(6)
[Address]
(7)
or
E
O
T
E
O
T
S
T
X
E
T
B
E
T
X
A
C
K
N
A
K
[Identifier]
Memory area number
When selecting
the data corresponding
to the memory area
No response
(1) Data link initialization
Host computer sends EOT to the SRZ unit to initiate data link before selecting sequence.
(2) Sending selecting address from the host computer
Host computer sends selecting address for the selecting sequence.
Address (2 digits):
This data is a host communication address of the COM-ML to be selected and must be the same as
the unit address set value in item
5.1
Address Setting (P. 21)
.
As long as the data link is not initialized by sending or receiving EOT, the selecting address
once sent becomes valid.
