Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 51)

Section 7: Selectable Writes
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SECTION 7 SELECTABLE WRITES
7.1 SCOPE
Chapter 7 covers Selectable Write Commands for the PROFIBUS Interface Option. It is
very important that programmers and users be familiar with this chapter before operating
the PROFIBUS Interface Option.
7.2 OVERVIEW OF TRANSFER COMMANDS
1. PROFIBUS Interface Card maximum buffer size: 112 byte buffer
2. Siemens PLC
a. TI 505 Series PLCs
Requires the Field Interface Module (FIM) to communicate over PROFIBUS.
Can continually exchange up to 32 words or 64 bytes for both PLC input and
output with each client device.
b. S5 Series PLCs
Requires IM 308C Module to communicate over PROFIBUS.
Can continually exchange up to 244 bytes for PLC input and output with each
client device.
c. S7 Series PLC
PROFIBUS ready, does not require additional modules.
Can Continually exchange up to 244 bytes for PLC input and output with
each client device.
3. Allen-Bradley PLC5 Series
a. Requires PROFIBUS DP module to communicate over PROFIBUS.
b. Can continually exchange up to 244 bytes for both PLC Input and Output with
each client device.
7.3 OVERVIEW OF SELECTABLE TRANSFER COMMANDS
1. It is important to keep in mind that the amount of bytes that can be
transferred is determined by the server not the PROFIBUS interface
option.
2. When using the HI 2151 Series Weight Controller PROFIBUS
interface, the user can select the Read Data Summaries and Write
Commands they require. However, the amount of bytes that can be
transferred is dependent on the data transfer capability of the server
being used.
3. By sending the proper commands to the HI 2151 Series Weight
Controller, the server can specify which weighing parameters and/or
status bits should be provided.