GE MN-ValVue-v2-8-IOM Manuel de service télécharger pdf (Page 44)

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ValVue Digital Communications Software Ver. 2.80

GE Oil & Gas

Master Mode ValVue communicates with a HART device as a primary master or as

a secondary master. HART is a Master-Slave communication proto-

col, where the slave (field device) replies to commands sent by the

master. The HART protocol lets a device communicate simultane-

ously with two masters, as long as they are different Masters: one

being a Primary Master and the other being a Secondary Master. A

Primary Master is defined as a host (or system interface) that is con-

nected permanently with a slave, such as a control system. A Sec-

ondary Master is a host (or interface) connected temporarily to the

slave (a handheld or laptop computer) and that is not part of the

control system.

When used with a multiplexor, operation is allowed when a second

HART master, such as a DCS system, is communicating. The ValVue

program must be configured to match the configuration of the mul-

tiplexor. If the multiplexor is a primary master, ValVue must also be

configured to be a primary master.

See “Configure Multiplexor Setup and Operation” on page 45.

Use HART server Check to use a HART server.

Using a Device List File When you select the Load Device Addresses from File option, each

time you connect a device to ValVue the address for the scanned

device is saved to a device list file. The device list file eliminates res-

canning each time Connect is selected and is useful in a multiplexor

setup.

Unless Load Devices Addresses from File is selected as an option,

the device addresses used are temporary and ValVue rescans for the

device’s address for each program start. If selected, you designate

the file where the device list is saved. This device list file is read and

appears when the program starts. To change the device list file or

create a new one:

1. Click Load Devices Addresses from File, click New File and

Figure 28 appears.

Figure 28 Device List Save As Window

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 659 660

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GE MN-ValVue-v2-8-IOM Manuel de service Page 44

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