Hardy HI 1746-WS - Manual (Page 36)

HI 1746-WS WEIGH SCALE MODULE
4-6
2 Command Status indicates if the command suc-
ceeded or not. The module writes a value of zero
(0) if the command succeeded. If the command
failed, the module writes an error code value
which indicates the reason for the command fail-
ure. (See the Error Code List.) The Error Code
table also lists the commands where the error
code is the sum of possible error bits.
3 Offset specifies which parameter will be read or
written.
4 Length is the number of bytes in a data string
field (32 bytes maximum or 16 words)
5 Datastring field is where the actual data is entered
you want to send to the module, or to receive
from the module. Example: To set the value of
one of the module’s parameters, the value of the
parameter is written in the Datastring field.
Logical File Interface
to Set Up for Remote
Mode of Operation (8
Word)
CAUTION: THIS SETUP INFORMATION IS FOR THE
REMOTE MODE OF OPERATION ONLY.
BEFORE SETTING UP FOR REMOTE MODE
OF OPERATION, CHECK TO BE SURE THE
JUMPER IS SET FOR REMOTE MODE AND
THAT THE MODULE IS INSTALLED IN A
REMOTE CHASSIS. (SEE CHAPTER 3, PG 3-2
FOR MORE INFORMATION)
About Logical
Files For the remote mode of operation, the HI 1746-WS
has no M files. Instead, the module contains files that
correspond to the 32 word I and O files used when the
module is in the local mode of operation. These files
are referred to as “Logical MFiles”. Logical MFiles
perform the function of the I, O, and M files used in
the local mode of operation but are not directly acces-
sible through the SLC backplane. (See Fig. 4-2)
• O = Output
• I = Input referenced to the CPU.