KROHNE Inc FMCW10G52 用户手册
DESCRIPTION OF HART INTERFACE
9
135
OPTIWAVE 5200 C/F
www.krohne.com
07/2016 - 4001904903 - MA OPTIWAVE 5200 R03 en
9.1 General description
The HART® Protocol is an open digital communication protocol for industry. It is free to use by
anyone. It is included in the software embedded in signal converters of HART-compatible
devices.
anyone. It is included in the software embedded in signal converters of HART-compatible
devices.
There are 2 classes of devices which support the HART® Protocol: operating devices and field
devices. There are 2 classes of operating devices (Master): PC-supported workstations (Primary
Master) and manual control units (Secondary Master). These can be used in control centres and
other locations. HART® field devices include sensors, converters and actuators. Field devices
include 2-wire and 4-wire devices, and also intrinsically-safe versions for use in hazardous
areas.
devices. There are 2 classes of operating devices (Master): PC-supported workstations (Primary
Master) and manual control units (Secondary Master). These can be used in control centres and
other locations. HART® field devices include sensors, converters and actuators. Field devices
include 2-wire and 4-wire devices, and also intrinsically-safe versions for use in hazardous
areas.
There are 2 primary operation modes for HART-compatible devices: point-to-point mode and
multi-drop mode.
multi-drop mode.
If the device is used in point-to-point mode, the HART® Protocol uses the Bell 202 Frequency
Shift Keying (FSK) standard to put a digital signal on top of the 4...20 mA signal. The connected
device sends and receives digital signals that agree with the HART® Protocol, and sends analog
signals at the same time. Only 1 device can be connected to the signal cable.
Shift Keying (FSK) standard to put a digital signal on top of the 4...20 mA signal. The connected
device sends and receives digital signals that agree with the HART® Protocol, and sends analog
signals at the same time. Only 1 device can be connected to the signal cable.
If the device is used in multi-drop mode, the network only uses a digital signal that agrees with
the HART® Protocol. The loop current is set to 4 mA. You can connect a maximum of 63 devices
to the signal cable.
the HART® Protocol. The loop current is set to 4 mA. You can connect a maximum of 63 devices
to the signal cable.
An FSK or HART® modem is included in field devices and manual control units. It is necessary to
have an external modem for PC-supported workstations. The external modem is connected to
the serial interface.
have an external modem for PC-supported workstations. The external modem is connected to
the serial interface.
9.2 Software description
HART® identification codes and revision numbers
Manufacturer ID:
0x45
Device:
0xD0
Device Revision:
1
DD Revision
1
HART® Universal Revision:
6
FC 375/475 system SW.Rev.:
≥ 2.0
AMS version:
≥ 7.0
PDM version:
≥ 6.0
FDT version:
1.2