Comment about addressing when shared=false (#1474)

* Comment about shared=false.

* hmm.

Author: janiversen

doc/source/library/simulator/config.rst

@@ -252,6 +252,20 @@ Example "setup" configuration:
 
     Defines if the blocks are independent or shared (true)
 
+    .. tip::
+        if shared is set to false, please remember to adjust the addresses, depending on in which group they are.
+
+        assuming all sizes are set to 10, the addresses for configuration are as follows:
+            - coils have addresses 0-9,
+            - discrete_inputs have addresses 10-19,
+            - holding_registers have addresses 20-29,
+            - input_registers have addresses 30-39
+
+            when configuring the the datatypes (when calling each block start with 0).
+
+        This is needed because the datatypes can be in different blocks.
+
+
 **"type exception"**
 
     Defines is the server returns a modbus exception if a read/write request violates the specified type.
@@ -295,8 +309,6 @@ In the example registers 5, 10, 11, 12, 13, 14, 15 will produce an exception res
 
 Registers can be singulars (first entry) or arrays (second entry)
 
-
-
 Write section
 ^^^^^^^^^^^^^