6. Function blocks
6.1 Manufacturer function blocks
Example FC15
Keep the 0-based address system in mind.
If the address range does not match the Modbus server's address range
because the former starts from 0 and the latter from 1, you will need to
use an offset.
In this case, you will need to set the start address to the original value
minus 1.
Alternatively, the option Auto-decrement on all addresses can be
activated with a checkmark.
The following parameter configuration for the MC function block does the following:
1. Requirement
Starting from register #21, write to the slave's Modbus RTU map the content of 8 ele-
ments from the marker range starting with marker word MW10; elements for FC15
mean a data type of BIT. Write the first 8 least significant bits of MW10.
Due to the 0-based address system, #22 must be entered in easyE4 as the
1st element index in order to read/write to the slave's Modbus RTU map
starting from register #21.
Fig. 253: Acyclical Modbus client request tab
See also
 → Section "AL - Alarm function block", page 465
 → Section "BV - Boolean operation", page 470
 → Section "D - Text display", page 474
 → Section "D - Text display editor", page 484
 → Section "DL - Data logger", page 503
 → Section "JC - Conditional jump", page 516
 → Section "LB - Jump label", page 521
 → Section "MR - Master Reset", page 534
 → Section "NC - Numerical converter", page 553
 → Section "ST - Set cycle time", page 559
 → Section "Modbus RTU map", page 549
548
easyE402/24 MN050009ENEaton.com
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