HA250385
Issue 7 Nov 06
Page 101
MULTIPOINT CIRCULAR-CHART RECORDER: USER GUIDE
n
Colour
1
Red
2
Green
3
Green
4
Blue
5
Blue
6Black
Table 11.4.4 Modbus implementation channel addresses (Sheet 2)
11.4.4 FUNCTION CODES (Cont.)
CODE
FUNCTION
RECORDER ACTION .................................................... CHANNEL 1
ADDRESS (DECIMAL)
04
Read input register
Analog input value .................................................................... 0
Input channel status ................................................................. 250
No bits set:
Channel OK
Bit 0 set:
Channel off
Bit 1 set:
Over range
Bit 2 set:
Under range
Bit 3 set:
Hardware error / bad PV
Bit 4 set:
Ranging error / no data
Bit 5 set:
Overflow
Bits 6 to 15: Always 0.
Derived channel value ............................................................. 500
Reserved (returns 0000) .......................................................... 750
Derived channel status ........................................................... 1000
(Bits 0 to 15 as for Input channel status above)
Instrument status (flags - code 7) ........................................... 1250
05
Force single coil
Sets digital input state for comms channel ............................... 0
0 = 0.000;
1 = 1.000
06Preset single register
Preset holding register ....................................................... As code 03
(Presets values for comms channels only)
07
Read exception status
Read instrument status
Bit 0:
System error
Bit 1:
Writing system failure
Bits 2 to 7
Always 0
08
Loopback test
Diagnostic code 0 (Echoes message as sent)
15
Force multiple coil
Sets digital input code for comms channels in ......................... 0
address range.
0 = 0.000; 1 = 1.000
16Preset multiple registers
Preset holding register for each channel in ....................... As code 03
address range.
(Presets values for comms channels only)
16Print text string
In addition to the above code 16
. ........................................... 7250
Data quantity is the total number of characters in the
text string (including colour commands) divided by two
(must have an even number of characters.
The text string must consist of no more than 39 characters
and may contain no more than 10 colour commands of the
form !n, where n is a numeric character from 1 to 6 as
shown in the table below. Text is printed in black unless
otherwise commanded The '!' character may not be used
as a text character.
MSB is printed first.
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