8-12 170 Series Monitor Revision C
2000947-004
Peripheral Devices: RS-232 Connectors
115 Transmit/Receive Mode
Once a valid request for data is received, the 170 Series Monitor will send only the
information that is requested. The selection of this information is done by sending a
request stream to the 170 Series Monitor. After processing the request, the 170
Series Monitor will then send only the selected parameters to the external computer.
The information selected by the external computer will be transmitted following the
same criteria described for the 115 Update Mode. The requested parameters may be
changed at any time by the host computer by sending a new request sequence.
NOTE: Refer to Requested Data Format on page 8-12 for information about the
response data format. The format is the same for both the 115 Update
mode and the 115 Transmit/Receive mode.
Requested Data Format
The format of the data requested by the external computer from the monitor is
shown in Figure 8-2.
NOTE: This applies to 115 Transmit/Receive mode only.
The definitions of the bytes are as follows:
Monitor Type
This field contains a 1-byte ASCII value indicating the type of monitor from which
information is being requested. The 170 Series Monitor is set to a fixed value of 9
(39H).
Data Field
This field of 1 to 8 bytes indicates which parameters the external computer wishes to
receive. The values for the bytes are given in Table 8-3.
End of Text
This 1-byte field contains the value 03H. If this byte is sent immediately following
the Monitor ID, then the 170 Series Monitor will cancel transmission of all data.
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