A-11
Continued 30H 34H 30H 30H 0DH
‘0’ ‘4’ ‘0’ ‘0’ CR
‘0’ ‘0’ ‘8’ ‘0’
D15 D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00
0000 0000 1000 0000
D07 RTD IS OPEN
‘0’ ‘4’ ‘0’ ‘0’
D15 D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01 D00
0000 0100 0000 0000
D10 ELECTRODES OPEN
1.3.9 Send Software Version 75H/117
To 2700 ADDR CMD
From 2700 ADDR CMD MAJ1 MAJ2 MIN1 MIN2
ADDR: Instrument Address
CMD: 75H
MAJ1: MSB of major part of release number in ASCII hex
MAJ2: LSB of major part of release number in ASCII hex
MIN1: MSB of minor part of release number in ASCII hex
MIN2: LSB of minor part of release number in ASCII hex
Example:
Instrument Address = 1
Version = 2.60
To 2700 81H 75H
From 2700 81H 75H 30H 32H 33H 43H
“0” “2” “3” “C”
where 3C hex = 60 decimal
1.3.10 Send Units Text 78H/120
To 2700 ADDR CMD TYPE
From 2700 ADDR CMD TYPE MAX1 MAX0 TXTd ... TXT0 NUL CR
ADDR: Instrument Address
CMD: 78H
TYPE: Type of units - 30H for Sensor Units, 31H for Dual Measurement Units
MAX1: MSB of number of units
MAX0: LSB of number of units
Number of units is in hex; 40 units, for example, is sent as 28 hex.
TXTd: Unit text bytes
NUL: Text string delimiter
CR: End of transmission
“Reserved” text units are transmitted as ‘?’ ‘?’ ‘?’ ‘n’, where ‘n’ is the nth “Reserved” text unit.
Example:
Instrument Address = 1
Sensor Units
There are 40 units for Sensors
To 2700 81H 78H 30H
From 2700 81H 78H 30H 32H 38H 75H 53H 2FH 6DH 00H ...
Snr ‘2’ ‘8’ ‘u’ ‘S’ ‘/’ ‘m’ NUL ...
MODEL 2700 APPENDIX A
SERIAL COMMUNICATIONS PROTOCOL
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