100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
User Guide
Page 135
HA028910
Issue 13 Sep 16
4.3.11 MATHS OPTION (Cont.)
MODBUS ADDRESSING
For units fi tted with the Modbus TCP comms option, the following table gives hex addresses for maths channel
1. Generally: Maths channel N parameter address = maths channel 1 parameter a 162 (N-1) (decimal).
For full details of the Modbus TCP implementation, see
section 8
.
MATHS CHANNEL CONFIGURATION DATA
CHANNEL 1
Ch1 Span high
Upper span value (display full scale)
Scaled
Read only
2FF1 (12273)
1
Ch1 Span low
Lower span value (display ‘zero’)
Scaled
Read only
2FF2 (12274)
1
Ch1 Zone high
Zone high value (two decimal places)
Scaled
Read only
2FF3 (12275)
1
Ch1 Zone low
Zone low value (two decimal places)
Scaled
Read only
2FF4 (12276)
1
Ch1 PV type
Input type
Enum
Read only
2FF5 (12277)
1
1 = Analogue input
3 = Totaliser
2 = Maths
4 = Counter
Ch1 Decimal places
Number of decimal places (0 to 9)
Uint16
Read only
2FF6 (12278)
1
(used by all scaled parameters except where stated)
Ch1 Colour
Channel colour (0 to 55)
Enum
Read only
2FF7 (12279)
1
(See
Annex B
for RGB defi nitions)
Ch1 Units
Units string (up to fi ve characters)
String_5
Read only
2FF8 (12280)
3
Spare
2FFB (12283)
2
Ch1 Open string
Open Digital Input string (up to eight characters)
String_8
Read only
2FFD (12285)
4
Spare
3001 (12289)
4
Ch1 Close string
Closed Digital Input string (up to eight characters)
String_8
Read only
3005 (12293)
4
Spare
3009 (12297)
4
Ch1 Descriptor
Channel descriptor (up to 20 characters)
String_20
Read only
300D (12301)
10
Spare
3017 (12311)
10
Ch1 No of alarms
Number of alarms on this channel
Uint16
Read only
3021 (12321)
1
Ch1 PV format
Enum
Read only
3022 (12322)
1
0 = Numeric
1 = Digital strings
Spare
3023 (12323)
60
Ch1 Alarm 1 enable
Alarm 1 enable
Enum
Read only
305F (12383)
1
0 = Off
2 = Latched
1 = Unlatched
3 = Trigger
Ch1 Alarm 1 type
Alarm 1 type
Enum
Read only
3060 (12384)
1
0 = Absolute low
1 = Absolute high
2 = Deviation in
3 = Deviation out
4 = Rate of change rise
5 = Rate of change fall
Ch1 Alarm 1 setpoint
Trigger setpoint (see note)
Scaled
Read/Write 3061 (12385)
1
Spare
3062 (12386)
10
Ch1 Alarm 2 enable
Alarm 2 enable (As alarm 1 enable above)
Enum
Read only
306C (12396)
1
Ch1 Alarm 2 type
Alarm 2 type (As alarm 1 type above)
Enum
Read only
306D (12397)
1
Ch1 Alarm 2 setpoint
Trigger setpoint (see note)
Scaled
Read/Write 306E (12398)
1
Spare
306F (12399)
10
Ch1 Alarm 3 enable
Alarm 3 enable (As alarm 1 enable above)
Enum
Read only
3079 (12409)
1
Ch1 Alarm 3 type
Alarm 3 type (As alarm 1 type above)
Enum
Read only
307A (12410)
1
Ch1 Alarm 3 setpoint
Trigger setpoint (see note)
Scaled
Read/Write 307B (12411)
1
Spare
307C (12412)
10
Ch1 Alarm 4 enable
Alarm 4 enable (As alarm 1 enable above)
Enum
Read only
3086 (12422)
1
Ch1 Alarm 4 type
Alarm 4 type (As alarm 1 type above)
Enum
Read only
3087 (12423)
1
Ch1 Alarm 4 setpoint
Trigger setpoint (see note)
Scaled
Read/Write 3088 (12424)
1
Spare
3089 (12425)
10
A/B switching
B values are not accessible via Mod-
bus. Span, Zone, Colour etc. are all
setting A
Parameter
Description
Type
Access
Start Addr.
Register
Name
Hex (Dec)
Length
Note: If the setpoint source for an alarm (
section 4.3.3
) is set to anything other than ‘Constant’, the
value returned is the previously confi gured constant value.