MULTIPOINT CIRCULAR-CHART RECORDER: USER GUIDE
HA250385
Issue 7 Nov 06
Page 102
RXA
RXB
CMN
TXA
TXB
2
3
5
PC Serial Port
(9-pin)
Transmit
Receive
0 Volts
Transmit
Receive
0 Volts
Recorder
RS422 to
RS232
Converter
11.4.4 FUNCTION CODES (Cont.)
65
Enter XMODEM mode
Holds 1 byte of data specifying which mode to enter
0 = standby;
1 = Receiver; 2 = Sender
66
Report XMODEM error
Returns 1 byte of data as follows:
0:
Transfer OK - no errors
1:
Restore failed completely
File was incompatible or comms failed
to transfer the file,
Original configuration unchanged.
2:
Restore failed on data.
Some records ignored, but transfer mostly
successful.
3:
Restore failed on transfer
Some config. transferred before failure.
New configuration undefined
16:
Save had no reply from comms and timed out
32:
Save failed before transfer completed
EXCEPTION RESPONSES
01
Illegal function
Unsupported or illegal Modbus function .................................. 0
02
Illegal data address
Data address out of range for instrument config ...................... 0
Attempt to preset input value of non comms channel
Invalid configuration data
03
Illegal data
Data value out of range for function
06Illegal busy
Configuration transfer in progress via another port
so unable to action function
Table 11.4.4 Modbus implementation channel addresses (Sheet 3)
11.5 XMODEM TRANSFER
XMODEM transfers take place between a host computer and a single instrument to save or restore configuration.
The transfer procedure is as follows
1. Place any other instruments on the communications link into standby mode.
2. Set the required recorder to sender or receiver mode as appropriate.
3. Send or receive file at host.
4. 10 seconds after completion, host communications is restored to normal use.
Note: 10 seconds of inactivity on the communications link, at any point in the procedure, will cause the host
communications to return to normal use for instruments in standby mode.
Figure 11.5 Recorder to PC wiring for transfer using configuration program
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