Agilent Technologies 969-8888, Instruction Manual

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TECHNICAL INFORMATION
103/107 87-901-011-01
Diagnostic management
In addition to the ProfiBus six byte standard diag-
nostic, the interface provides both user diagnostic
and static diagnostics functions
The standard diagnostic management is fully com-
pliant with the ProfiBus specification.
During the start-up phase after power on, the first
byte in the user diagnostic area, can assume val-
ues different from zero.
This byte has the following meaning:
•
Bit 0 = 1: controller not responds (RS485 link
broken)
•
Bit 1 = 1: controller not identified (not compati-
ble with the ProfiBus gateway)
•
Bit 2 = 1: first loop of requests not ended (val-
ues in the input data are not fully coherent yet)
So, if the first byte is equal to 0, the interface is
working properly, otherwise there is a problem.
Each nibble in the bytes following the interface
status byte represents the status of the last at-
tempt to write a parameter with following coding
(diag status byte):
0 Write
success
1 Controller response was “NACK”
2 Controller response was “Unknown window”
3 Controller response was “Bad Data Type”
4 Controller response was “Over range”
5 Controller response was “Bad operation”
6 Controller response was an unknown response
F Parameter not supported by the controller
The ProfiBus external diagnosis services are used
to report following unexpected situations:
•
Controller fail:
if the controller goes in fail
mode, an external diagnostic service is re-
quired and one byte in the diagnostic buffer
signals the type of failure.
•
User parameter mismatch:
if the user sets
one or more parameters out of their allowed
range, a ProfiBus external diagnostic service
is required and some bits in the diagnosis
frame signals which parameter is wrong (i.e.
over range or under range).
Diagnostic buffer
OFF
SET
MEANING
0 B
0
station non exist
(set by master)
B
1
station not ready
(slave not ready for
data exchange)
B
2
cfg fault
(configuration data doesn’t
match)
B
3
ext diag
(slave has external diagnostic data)
B
4
not supported
(slave doesn’t support re-
quested function)
B
5
invalid slave response
( slave sets per-
manent ‘0’)
B
6
prm fault
(wrong parameter assignment)
B
7
master_lock
(slave is parameterised by
another master)
1 B
0
prm req
(slave has to be re-
parameterised)
B
1
stat diag
(static diagnosis)
B
2
fixed ‘1’
B
3
wd_on
(response monitoring active)
B
4
Freeze mode
(received freeze command)
B
5
Synch mode
(received synch command)
B
6
reserved
B
7
diag deactivated
(slave is parameter-
ised by another master)
2 Reserved
3
Master Add
(master address after parameterisa-
tion. FF= without parameter)
4 Ident number high
5 Ident number low
6 External diagnosis “Header” length indication
including header
Standard diagnostics
7 Interface Status
B
0
Controller not responds
B
1
Controller not identified
B
2
Input data not fully coherent yet
B
3
Not used
B
4-7
Not used
8 B
7-4
– Start/Stop diag status
B
3-0
– Low Speed diag status
9 B
7-4
– Soft Start diag status
B
3-0
– Active Stop diag status
10 B
7-4
– Vent Valve diag status
B
3-0
– Purge diag status
11 B
7-4
– Heather Jacket diag status
B
3-0
– Stop Speed Reading diag status
12 B
7-4
– High speed setting diag status
B
3-0
– Low speed setting diag status
13 B
7-4
– Water Cooling Max Temp diag status
B
3-0
– Water Cooling Hyst diag status
14 B
7-4
– Set Point Hyst diag status
B
3-0
– Heather Jacket Setting diag status
15 B
7-4
– Flow Meter Threshold diag status
B
3-0
– Reserved diag status
16 B
7-4
– Set Point Value diag status
B
3-0
– Set Point Delay diag status
17 B
7-4
– Vent Valve Open Delay diag status
B
3-0
– Vent Open Time diag status
18 B
7-4
– Vent/Purge Auto/Man diag status
B
3-0
– Vent/Purge Remote/Profibus diag status
19 B
7-4
– Interlock Mode diag status
B
3-0
– Set Point Logic diag status
20 B
7-4
– Heather Jacket Mode diag status
B
3-0
– Load Gas Type diag status
21 B
7-4
– Purge Gas Type diag status
B
3-0
– Start/Stop/Interlock Mode diag status
22 B
7-4
– Set Point Type diag status
B
3-0
– Analog Out Type
23 B
7-4
– Reserved
B
3-0
– Reserved
External diagnostic