TECHNICAL INFORMATION
87
87-900-968-01(C)
The two machines continuously share I/O data
with the relative bus, and interact each other only
in following conditions:
•
ProfiBus Data Exchange is suspended (static
diagnosis activated) if the internal serial link in
not established
•
Internal serial link Data Exchange is sus-
pended (only for output data) if the ProfiBus
State machine is not in Data Exchange mode
As a general rule, unrecoverable communication
errors make each machine to jump to the state
immediately following the power-on state
(WAIT_PRM or SRC_ADDR)
Message mapping
The communication is based on the continuous
data exchange capability of the ProfiBus standard,
where the master sends continuously the entire
slave configuration and reads back the entire slave
status.
For this purpose one Input (from slave to master)
and one Output (from master to slave) buffers are
provided. All the needed parameters are mapped
inside each buffer.
The following tables summarise the ProfiBus pa-
rameter access, related to the corresponding win-
dows serial protocol (for this protocol please refers
to the serial interface paragraph).
The interface doesn’t any scaling operation on the
read/written parameters. It acts only as a gateway
between the ProfiBus network and the pump’s
controller serial interface. As a consequence of
this, the scale and the meaning of some parame-
ters depends directly to the specific model of
Turbo Pump controller connected to the interface.
PROFIBUS MESSAGE MAPPING
PARAMETER BUFFER (17 BYTES)
OFFSET
BYTE
SIZE
BYTE
UNIT
RES
RANGE DESCRIPTION
WIN
SERIAL
0
1
°C
15-35
Water Cooling Max Temperature
Enter here the max temperature you foreseen for your cooling system, this
value will set the maximum power provided to the pump (see Input Buffer
byte-4)
158
1
1
°C
1-5
Water Cooling Hysteresis
Set here the hysteresys on water cooling measurement (default=1,
don’t change if not necessary)
159
2 1 %
1-99
Setpoint
Hysteresis
Set the hysteresis on set point output (see set point out paragraph)
105
3
1
°C
-
Heather Jacket Temperature Setting
Specific option, not available on standard models
113
4 1
Sccm
-
Flowmeter
Threshold
Specific option, not available on standard models
115
5 2 - -
Reserved
-
7 2
Hz/mA/s
-
Setpoint
Value
Set the threshold for the set point out
102
9
2
s
0-99999 Setpoint Mask Time
Set the time during the controller does not drive the set point out
103
11 2
0.2*s
0-65535
0 = inf.
Vent Valve Opening Delay
Set the delay time between the stop command and vent opening.
Valid only in “purge/vent auto mode” (Parameter Buffer byte-15 B1=0);
default = 15; 0 = infinite (the valve will never open)
126
13 2
0.2*s
0-65535
0 = inf.
Vent Valve Open Time
Set how long the vent will remain open, then both purge and vent will be
closed.
Valid only in “purge/vent auto mode” (Parameter Buffer byte-15 B1=0);
0 = infinite (the valve remain open till a start command)
147
