Emerson Rosemount 56, Инструкция по эксплуатации

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96 Profibus Communications
Section 12: Profibus Communications Instruction Manual
April 2017 LIQ-MAN-56
• The DP device supports the function Set_Slave_Add for setting the slave address via the
PROFIBUS. The slave address for the 56 can be set automatically or manually by the
Profibus master.
The DP device supports DP-V0 cyclic services and Identification and Maintenance (I&M)
function: - I&M 0
• The Minimum Slave Interval is 100
μ
sec minimum interval between two poll cycles.
56 Modules
The 56 is a multiparameter device, which supports a number of combinations of 2 analytical
measurements, and four relays which can be configured for a number of discrete functions.
As a result, the 56 is defined as a modular station, to allow it to cover these measurements,
relay status, and associated information. The 56 has 36 modules available and 33 can be
inserted into the device. They include:
• The two main measurements, their units, and the measurement
• The temperature measurements from each board and their units
• Dual conductivity measurements: conductivity ration, percent passage and percent rejection
• Dual flow board measurements: flow recovery, flow difference, and flow unit
• Alarm relays (4 possible): their type, state, logic assignment and simulate status
Details of the module are in Section 12.3 Profibus Communications.
56 Device Diagnostics
A number of diagnostic bits are provided via Profibus, which cover the fault and warning messages
for the 56 main board, signal boards, and measurements. They are organized as follows:
*Bit position after the header byte.
Details of the diagnostic bits appear in Tables 12.3.10 and 12.3.11.
Diagnostic Bits* Bit Description
16 Change in Diagnostic Data
24-27 Main Board Faults
33-38 Main Board Warnings
40-57 Signal Board 1 and Measurement Faults
72-89 Signal Board 2 and Measurement Faults
104-121 Signal Board 1 and Measurement Warnings
136-153 Signal Board 2 and Measurement Warnings
Table 12-1. Device Diagnostic Bits