Hitachi 902 - Response from Host; Transfer of Communication Control Message; Transfer of Test Selecting Information

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(2) Transfer of Communication Control Message (analyzer ↔ host)
The RES, ANY, MOR, REP, SUS and REC frames are available for the communication
control messages.
For details, refer to Table 16-4.
(a) RES frame
The host can make a request to the analyzer side (just called "analyzer" hereafter)
for analytical data of a specific sample by use of the RES frame. However, the
analyzer sends the ANY frame in the following cases.
(i) The analyzer has no relevant data.
(ii) FD error occurs during access to the relevant sample data.
Data is transferred in the received sequence, starting from completion of
transmitting the measurement result data in real-time mode.
The analyzer is capable of storing data of up to 10 routine samples in each of ID
mode and sample No. mode. That is, data of more than 11 samples is ignored.
The analyzer does not transfer measurement data in case of sending from the host
in the sample No. mode (without ID) though ID is provided.
If transferring the RES frame from the host when FD is occupied by a factor, the
presence or absence of an FD error is checked with the relevant factor terminated.
The result of FD error check is described below. During this process,
communication is in the event occurrence status.
1) If FD error is absent................................... RES frame is transferred.
2) If FD error is present ................................. RES frame is not transferred.
When interruption is cased by RES frame during batch transfer, a batch-specified
sample may be transferred before one sample because FD access time is allowed.
In this case, after the text for one batch-specified sample is transferred, the RES
frame will be transferred.
(3) Transfer of Test Selecting Information (analyzer ↔ host)
Response from host
Frame A Description
SPE To return test selecting information for a sample sent from analyzer
MOR To indicate that host cannot respond to test selecting information inquiry but is
ready to receive analytical data
REC To suspend communication with analyzer for the specified period of time because
host cannot respond to test selecting information inquiry nor receive analytical
data
Analyzer
Positive response
Analytical data request
Analytical
data transfer
ANY
ANY
FR1
MORMORRES
Analyzer
SPE
HOST
A
HOST