Hardy HI 2151/30WC Single-Scale Controller User Manual
Page 10
HI 2151 Series Weight Controller
Profibus Interface Option
4
2. Humidity:
0 to 80% Relative Humidity (Non-condensing)
Baud Rate
9,600 kbaud to 12 Mbaud - (Auto-Selectable)
Process Control Standards Reference
Process Fieldbus (PROFIBUS) - DIN 19 245
Reference Data Protocols
Master manuals will reference data either in bytes or words using the different protocols
that are particular to a server or series of servers. For example:
1. The Siemens TI 505 Series of PLCs use the Motorola protocol and expresses reference
data in bytes.
2. The Siemens S5 and S7 PLC series and the Allen-Bradley PLC5 PLC series use an
Intel protocol and express reference data in words.
3. The PROFIBUS manual references both bytes and words.
This means that the Least Significant Byte (LSB) and the Most Significant Byte (MSB)
locations vary. Note that two bytes equals one word. (See the charts below)
Siemens TI 505 or others using (Motorola) Protocol (Bytes)
One Word (Expressed in Bytes)
Least Significant Byte (LSB)
Most Significant Byte (MSB)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Siemens S5 and S7 & Allen-Bradley PLC5 PLC series or others using (Intel) Protocol (Bytes)
One Word (Expressed in Words)
Most Significant Byte (MSB)
Least Significant Byte (LSB)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TABLE 1-1 REFERENCE DATA PROTOCOLS