Hach sc1000 - Manual (Page 111)

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Advanced Operations
6.3.4 Network Modules (Profibus, Modbus)
The sc1000 controller can be embedded as a slave into an existing fieldbus system. The
Network Modules menu displays all the settings needed, the menu content depends on
the communication gateway used, Profibus DP or Modbus.
Note: This menu is displayed only if a network card is installed in the sc1000 controller.
6.3.4.1 Profibus
SYSTEM SETUP
NETWORK MODULES
FIELDBUS
TELEGRAM
Builds an individual composition of data from different devices. These data structure allows to
transmit up to 24 measured values on one Profibus slave device.
For details refer to
section 5.12 on page 62 .
PROFIBUS DP
ADDRESS
Default value: 0
Sets up the PROFIBUS address (1 to 128) for the slave.
DATA ORDER
Default value: NORMAL
Sets the sequence of bytes when transmitting floating point values.
Please note that this setting only affects the data of the configured slave.
A floating point value consists of 4 bytes.
SWAPPED: Swaps the first pair of bytes with the last pair.
NORMAL: The pairs are not swapped. This mode fits to all known Profibus master systems.
Note: A wrong setting in this menu can lead to slight deviations of floating point values shifted by
one register.
SIMULATION
Simulates two floating point values and error/status to substitute a real instrument.
The tag order is:
1. Tag: ERROR
2. Tag: STATUS
3./4. Tag: First floating point value counting to MAXIMUM value respectively MINIMUM value.
5./6. Tag: Second floating point being the difference between the first floating point value and the
value set in the MAXIMUM. menu
The first floating point runs through a ramp between the limits set in the menus MAXIMUM and
MINIMUM.
Figure 65 shows the simulation mode.
SIMULATION
Default value: NO
Turns the simulation on or off.
YES: Starts a simulation
NO: Stops a simulation.
PERIOD
Default value: 10 minutes
Sets the time the first floating point value needs to run through the whole range between
MINIMUM and MAXIMUM.
MAXIMUM
Default value: 100
Sets the upper limit for the first floating point value.
MINIMUM
Default value: 50
Sets the lower limit for the first floating point value.
ERROR
Default value: 0
The value entered in this menu will be set in the first simulated tag (
Table 15 ).
STATUS
Default value: 0
The value entered in this menu will be set in the second simulated tag (
Table 16 ).
TOGGLE Changes the direction of the simulated ramp.