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35
Installation and Operation Manual
X-DPT-Profibus-Interface-eng
PN 541-C-068-AAG
November, 2008
Explanation of error/alarm bits:
1.
Temperature too high error
: If the ambient temperature exceeds the
device’s maximum operating temperature, this alarm will be set. It will
disappear if the temperature drops below the maximum operating tempera-
ture again.
2.
Power too low error
: The power too low error bit is set if the internal
analogue power level drops below 12 Vdc. The digital level can still operate,
but the analogue read-out can become inaccurate. This may be caused by
a short-circuit on board the electronics.
3.
No flow indication error
: This error may occur if the valve out of range
alarm is also set. It indicates the absence of flow, although the valve is fully
opened. It may be caused by a lack of gas supply. This alarm does not
occur if the device is a meter model, and it disappears if the gas flow
returns to normal.
4.
Temperature too low error
: If the ambient temperature drops below the
device’s minimum operating temperature, this alarm will be set. It will
disappear if the temperature exceeds the minimum operating temperature
again.
5.
Flow obstruction error
: This error may occur if the valve out of range
alarm is also set. It indicates a possible obstruction of gas flow, although
the valve is fully opened. This may be due to a partially block gas supply or
outlet (i.e. the gas is not fully zero). This alarm does not occur if the device
is a meter model, and it disappears if the gas flow returns to normal.
4.6 DATA EXCHANGE MODE
This function permits the local user of the DP-Master to transmit output data to
a DP-Slave and at the same time to request input data from this remote station.
The number of input and output data which are reserved by the DP-Slave are
checked against the configuration data during the start-up phase of the DP-
System (see the chapter 4.5 Configuration).
The data exchange mode will remain until the master is stopped or the network
is reconfigured. The set of actual parameters is selected during the configura-
tion of the slave. For the controller model there are three modules of input /
output available and two modules for the meter model. On the following page
tables are shown with the memory map (order parameters) of these modules.
Please, make also notice of the notes concerning the command buyte and the
consistent data construction at the end of this paper.