In the Record Indication, a read or write command is sent for an index. The Record
Response contains the answer to a request.
A Record Indication is transmitted from the master to the slave. The MLG-2 interprets
this request and makes the data available.
The different data sets (objects) are addressed using indexes. An object’s index speci‐
fies the data object within a slot/subslot.
NOTE
On the MLG-2, the data objects are not slot- or subslot-dependent. The only require‐
ment is that valid slot/subslot/index addressing be used (e.g., 1/1/40h).
Once the MLG-2 has been integrated into PROFIBUS, the following steps can be per‐
formed:
•
The MLG-2 device name can be set
•
The device name can be used in the PLC
•
Parameters can be set for the MLG-2
•
Modules can be set for the process data
7.1.1 Addressing
A unique address must be assigned to each PROFIBUS slave for communication. The
range of valid address is 1 through 125.
The following addresses are reserved:
•
The address 0 is reserved for diagnostic tools such as programming devices.
•
The address 126 is the default slave address. When this address is set, a different
address must be assigned to enable communication with the slave.
•
The address 127 is reserved for addressing all subscribers and for addressing
groups.
NOTE
The address 126 is configured at the factory. All DIP switches are set to 0, which is why
the address 126 is active. To properly integrate the MLG-2 in PROFIBUS, you must first
set a different valid address.
The following addressing options are available:
•
Addressing via DIP switches on the fieldbus module
•
Addressing via SOPAS ET
•
Addressing via PROFIBUS DP master
Addressing via DIP switches
Eight DIP switches are located under a cover on the fieldbus module (see "Display and
operating elements", page 30). You can use these DIP switches to set the address for
the MLG-2.
THE MLG-2 ON THE PROFIBUS NETWORK 7
8018748.1Q3I/2024-12-18 | SICK O P E R A T I N G I N S T R U C T I O N S | MLG-2 ProNet
59
Subject to change without notice
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