Rockwell Automation 57C428 Toledo Scale Interface Module - Manual (Page 20)

4Ć4
bits
register 64
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
request/status
Value
ă1 = User request to update information in registers 65Ć77.
ă0 = Update completed without error.
-1 = The checksum calculated by the module did not match the
checksum character in the receivedmessage.
-2 = A nonĆnumeric character was detected when converting the
Indicated Weight or Tare Weight data to binary.
-3 = A message with validstartĆofĆmessage andendĆofĆmessage
characters did not contain 18 bytes.
-4 = No link activity. A startĆofĆmessage character was not receivedin
the time specifiedin Register 22.
-5 = A positive value greater than one was detected in the request/
status register.
-6 = A checksum character was not receivedwithin 16 msec. after a
valid endĆofĆmessage character was received. Check that the
scale is configuredfor transmitting a checksum.
Figure 4.6 Ć Request/Status Register Error Codes
Register 65 is incrementedby the module each time it receives a
startĆofĆmessage character on the serial interface. The value will
range from 0 Ć 255. Use this register to determine whether the data
containedin registers 66Ć77 has changedfrom the last time it was
read. Refer to figure 4.7.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 bits
register 65 0 0 0 0 0 0 0 0 message counter
Figure 4.7Ć Message Counter Register
Registers 66Ć72 contain the data that was received in the last
message from the Toledo Scale digital indicator.