This field defines whether the command is to be executed
under certain conditions.
Disabled (0) = The command is disabled and is not executed
in the normal polling sequence.
Continuous (1) = The command is executed each scan of the
command list if the Poll Interval (see below) is set to zero. If
the Poll Interval is set to a nonzero value, the command is
executed when the interval timer expires.
Conditional (2) = For write commands only. The command
executes only if the internal data associated with the
command changes.
Bit/Word Override upon Error (3) = For read commands
only. If a command error occurs, the module overrides the
associated database area with the Override Value Upon Error
parameter value.
Float Override upon Error (4) = For read commands only. If
a command error occurs, the module overrides the associated
database area (2x word count) with the Override Value Upon
Error parameter value.
Specifies the module’s internal database register to be
associated with the command. Allowable range is 0 to 9999
for Modbus Function Codes 3, 4, 6, or 16, and 0 to 65535 for
Modbus Function Codes 1, 2, 5, or 15.
If the command is a read function, the data read from the
slave device is stored beginning at the module’s internal
database register value entered in this field. This register
value must be in the Read Data area of the module’s memory,
defined by the Read Register Start and Read Register Count
parameters in the Module section.
If the command is a write function, the data to be written to the
slave device is sourced beginning from the module’s internal
database register specified. This register value must come
from the Write Data area of the module’s memory, defined by
the Write Register Start and Write Register Count parameters
in the Module section.
Note: When using a bit level command, you must define this
field at the bit level. For example, when using function codes 1
or 2 for a Read command, you must have a enter of 160 to
place the data in the MBS.DATA.ReadData[10] controller tag
in RSLogix 5000 . Think of it as the 160th bit of MBS internal
memory (MBS Internal register 10 * 16 bits per register =
160). Use this formula for function codes 5 or 15 for writing
bits also.
This controller tag is a 16bit signed integer. This means you
can only enter values of -32768 to 32767 in the tag. If a value
to be entered is above the 32767 (but below 65535) threshold,
it displays as a negative value in the tag. Simply subtract
65536 from the value to get the 'acceptable' value to enter into
the tag.
Example: You need to use an Internal bit Address of 48000,
but you cannot enter '48000' into the tag because it causes an
error. 48000 - 65536 = -17536 You enter -17536 in the
Internal Address parameter for this command.
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