3. Select the data exchange direction:
► SIGMA CONTROL 2 ⇆ Bus master (SIGMA CONTROL 2 sends process data and receives
control data):
Send/Receive or Master: Set Com-Module.
► SIGMA CONTROL 2 → Bus master (SIGMA CONTROL 2 sends process data):
Send or
Master: Setting SAM/JSON-RPC.
For connection to a SIGMA AIR MANAGER:
Send/Receive or Master: Set Com-Module.
4. Set the slave address (
Slave No.:). The permissible address length is between 3 and 126. For
connection to a SIGMA AIR MANAGER: Slave address = compressor 102.
5. Set the required reaction in the event of a bus fault (see next chapter, “Reaction in a PROFI‐
BUS bus fault”).
6. Start the communication module with the set parameters. Activate the
Reset check box.
The communication module is started with the set parameters.
7. Time-out at bus fault is activated.
Bus communication is now monitored.
The number behind
Status Counter (Run) continuously changes during communication.
Reaction in a bus fault
Only for machines.
After switching on the power supply, the bus alarm can be suppressed for a definable period of
time. The setting depends on the time passing at the bus master between return of voltage and
start of communication via the bus.
Parameters Factory setting Set value
Start td
15 s
SIGMA AIR MANAGER without SIGMA AIR CONTROL
plus
30 s
SIGMA AIR MANAGER with SIGMA AIR CONTROL
plus
40 s
Tab. 68 Setting the
Starttd parameter
SIGMA CONTROL 2 monitors the bus communication at log level (PROFIBUS). If there is a check
box behind
Communication error, this monitoring in the Send mode can be switched off by deacti‐
vating the check box.
In
Send/Receive or Master modes, SIGMA CONTROL 2 can monitor: Com-Module the bus com‐
munication at user level. For this purpose, the bus master reads a value ("toggle bit") that changes
with every bus cycle and returns it without change. SIGMA CONTROL 2 returns a bus alarm if the
bit does not change for a time longer than set (
Timeout). Activate monitoring by setting a check
mark ☑.
For the connection to a SIGMA AIR MANAGER, set the following:
Parameters
Factory setting
Set value
Timeout
5 s
5 s
Monitoring
Check box ☑ activated
Check box ☑ activated
Tab. 69 Setting the
Timeout parameter
➤ Enter the required settings, as described above.
8
Initial Start-up
8.7
Setting the machine for master control operation
110
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 4.0.X
No.: 901700 14 E
