Rockwell Automation 57C428 Toledo Scale Interface Module - Manual (Page 25)

4Ć9
4.4 Message Transmission Time
Thetimerequired for a messageto betransmitted is:
Time(in milliseconds) = 198,000/Baud Rate
The module requires less than 1 millisecond to receive the message
and storeit in dual port memory.
4.5 Restrictions
This section describes limitations and restrictions on the use of this
module.
4.5.1 Remote Racks
This moduleshould not beused in a remoterack.
4.5.2 Reading Toledo Scale Data
Registers 65Ć72 should not be read without first performing a
request update" via register 64.
4.5.3 Writing Data to Registers
This module contains registers that are read only. Attempts to write to
them will cause a bus error (severe system error). The following are
examples from programs that writeto themoduleand should
therefore be avoided if they involve readĆonly registers:
a. Referencing the module from the coil in a ladder logic task.
b. Referencing the module on the left side of an equal sign in a LET
statement in a control block or BASIC task.
c. Referencing the module as an output in a control block function.