Register Map (Organization of Communication Variables)

Introduction

Communication variables are listed in tables, according to the group (such as identification, statistics, or monitoring) to which they belong. They are associated with an LTMR controller, which may or may not have an LTME expansion module attached.

Communication Variable Groups

Communication variables are grouped according to the following criteria:

Variable Groups	Registers
Identification variables	00 to 99
Statistics variables	100 to 449
Monitoring variables	450 to 539
Configuration variables	540 to 699
Command variables	700 to 799
User Map variables	800 to 999
Custom Logic variables	1200 to 1399

Table Structure

Communication variables are listed in 4-column tables:

Column 1

Register (in decimal format)

Column 2

Variable type Data Types

Column 3

Variable name and access via Read-only or Read/Write Modbus requests

Column 4

Note: code for additional information

Note

The Note column gives a code for additional information.

Variables without a code are available for all hardware configurations, and without functional restrictions.

The code can be:

Numerical (1 to 9), for specific hardware combinations
Alphabetical (A to Z), for specific system behaviors.

If the Note is...	Then the Variable is...
1	Available for the LTMR + LTMEV40 combination
2	Always available but with a value equal to 0 if no LTMEV40 is connected
3-9	Not used

If the Note is...	Then...
A	The variable can be written only when the motor is OFF Restrictions A, B, and C apply only to bits, not to whole registers. If you try to write a value when a restriction is applied, the bit will not be changed and no exception code will be returned. Exception codes are returned at register level, not at bit level. *
B	The variable can be written only in configuration mode (for example, static characteristics) Restrictions A, B, and C may apply only to bits, not to whole registers. If you try to write a value when a restriction is applied, the bit will not be changed and no exception code will be returned. Exception codes are returned at register level, not at bit level. *
C	The variable can be written only with no trip Restrictions A, B, and C may apply only to bits, not to whole registers. If you try to write a value when a restriction is applied, the bit will not be changed and no exception code will be returned. Exception codes are returned at register level, not at bit level. *
D-Z	Not used

Unused Addresses

Unused addresses fall into three categories:

Not significant, in Read-only tables, means that you should ignore the value read whether equal to 0 or not.
Reserved, in Read/Write tables, means that you must write 0 in these variables.
Forbidden, means that read or write requests are rejected, that these addresses are not accessible at all.