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Controller Set Up & Network Configuration 2408
f
& 2408
f
PROFIBUS Communications Handbook
4-4 2408
f
and 2404
f
PROFIBUS Communications Handbook
P
ROFIBUS
D
IAGNOSTICS
One of the features of PROFIBUS-DP is that high priority diagnostic information is provided for each slave. The 2400
f
Series uses the ‘Ext_Diag_Data’ area of this message (bytes 7 and 8) to send a word containing 16 bits of information
pertaining to the process and alarm status of the controller: The documentation supplied with your master should provide
further details on how to access diagnostic information.
BIT DESCRIPTION
0 Alarm 1 State ( 0 = Safe 1 = Alarm )
1 Alarm 2 State ( 0 = Safe 1 = Alarm )
2 Alarm 3 State ( 0 = Safe 1 = Alarm )
3 Alarm 4 State ( 0 = Safe 1 = Alarm )
4 Manual Mode ( 0 = Auto 1 = Manual )
5 Sensor Break ( 0 = Good PV 1 = Sensor Broken )
6 Loop Break ( 0 = Good closed loop 1 = Open Loop )
7 Heater Fail ( 0 = No Fault 1 = Load fault detected )
8 Tune Active ( 0 = Auto Tune disabled 1 = Auto Tune active)
9 Ramp/Program Complete ( 0 = Running/Reset 1 = Complete )
10 PV out of range ( 0 = PV within table range 1 = PV out of table range )
11 DC control module fault (0= Good. 1= BAD)
12 Programmer Segment Synchronise (0 = Waiting, 1 = Running)
13 Remote input sensor break (0 = Good, 1 = Bad)
14 IP1 Fault
15 Reserved
Table 4-2: Summary Output Status Word
A ‘new diagnostics’ event will occur whenever any of the monitored events changes state...
Diagnostics Example
The example below may be returned which gives a summary of the Output Status Word information shown in the table
above.
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
XX XX 24 XX XX 03 40 30
Byte 6 signifies 3 bytes of information are included
Bytes 7 & 8 are 4030Hex or 01 00 00 00 00 11 00 00 Binary
From table 4-1:
Bit 4 is set Meaning the controller is in Manual Mode
Bit 5 is set Meaning the controller is in Sensor Break
Bit 14 is set Meaning the controller is in IP1 Fault
Global Commands
This is a further PROFIBUS-DP feature, which is not supported by the 2400f series of temperature controllers.