1 example, 5function blocks – Lenze E94A User Manual
Page 268
5
Function blocks
5.71
L_DevParReadFix - read parameter
268
Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05
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5.71.1
Example
The following example is intended to serve you as an installation guide for your own plant.
Task
The client, a 9400 controller, is supposed to read out code C00011 of the server, another 9400 con-
troller, via a free SDO channel of the "CAN on board" system and provide the information to the ap-
plication. At the same time, communication from the »Engineer« towards the client and the server
is enabled via the basic SDO channel.
Initial situation
[5-34] Initial situation
• Parameter data channel 1 (the basic SDO channel) is always used for the communication to-
wards the »Engineer«.
• The basic SDO channel is permanently set to 0x600 + node number or 0x580 + node number,
respectively, and can neither be changed nor deactivated according to CiA301.
• In the Lenze setting, the 9400 server has deactivated SDO server channels 2 ... 10 (bit 31 of the
Rx/Tx identifiers has been set).
Note!
The cycle time specified via the input dwCycleTime is only valid for the use of the FB in a
1-ms task! For a longer task cycle the cycle time is extended accordingly:
When the FB is used in the unsolicited task, the cycle time set is not effective. In this case,
use a preceding FB
instead to activate the read request cyclically:
• Connect the output bOut of the FB
to the input bExecute.
• Set the desired cycle time via the parameters of the FB
.
Cycle time
dwCycleTime [ms] Task cycle [ms]
⋅
1 [ms]
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