KAESER SIGMA CONTROL 2 Service Manual

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
Tab. 68 Setting the Starttd parameter
SIGMA CONTROL 2 monitors the bus communication at log level (Modbus). If there is a check box
behind Communication error , this monitoring in the Send mode can be switched off by deactivating
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 the check box to enable monitor‐
ing.
Parameters Factory setting Set value
Timeout 5 s
Monitoring Check box ☑ activated
Tab. 69 Setting the Timeout parameter
➤ Enter the required settings, as described above.
8.7.3.4 Commissioning the Modbus TCP module
Machine
Precondition Access level 2 is activated.
The network parameters are known. Request the required information from your IT department
1. Open the 8.2 <Communication – Com-Module> menu.
2. Activate the Com-Module Start check box.
The communication module is activated. The system detects the communication module type
and displays it in the Type line.
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 .
4. Set the required reaction in the event of a bus fault (see next chapter, “Reaction in a PROFI‐
BUS bus fault”).
5. Set IP-Parameter as described below.
8 Initial Start-up
8.7 Setting the machine for master control operation
No.: 901700 10 E
Service Manual Controller
SIGMA CONTROL 2 BLOWER ≥ 2.5.3
109

KAESER SIGMA CONTROL 2 Specifications

General

Controller Type	Microprocessor-based
Model	SIGMA CONTROL 2
Manufacturer	KAESER
Input Voltage	24 V DC
Protection Class	IP54
Communication Protocols	Modbus, Profibus
Data Logging	Comprehensive data logging
Remote Monitoring	Yes
Communication Interface	Ethernet