Siemens DTU3005-B Manuel de l'opérateur télécharger pdf (Page 52)

8 DTU3005P Profibus Application Notes

48 Siemens Energy & Automation, Inc.

SEAbus Device Status Mask

The Device Status Mask contains 1 bit for each

device. A bit will be a “1” if the device is configured

but not responding when the DTU3005P attempts

to communicate with it. Otherwise, the bit will be a

“0.”

SEAbus Device No Response Count

The “No Response Count” is incremented each

time an attempt is made to communicate with a

configured device and it does not respond. This

count is reset to zero each time the DTU3005P is

powered up or reset.

SEAbus Device Data Error Count

The “Data Error Count” is incremented with each

occurance of a communication data error (character

framing error, parity error, message check sum error,

or partial or bad response received). This count is

reset to zero each time the DTU3005P is powered

up or reset.

8.9 DTU3005P Profibus Slave Address

The DTU3005P supports the Set Slave Address

function. Whenever the address is changed through

the Profibus interface with the Set Slave Address

function from the Profibus-DP host, the new

address is stored in non-volatile memory and is used

each time the DTU3005P is powered up (unless

changed through the Profibus interface or with the

Configuration software).

8.10 DTU3005P Operation Modes

The DTU3005P has two operation modes that are

selected by positions 1-3 of the Dip Switch on the

front of the DTU3005P. Please note that whenever

the DTU3005P detects that the Dip Switch is being

changed, it will stop the current operation mode and

wait 5 seconds for the change to be completed

before entering the new operation mode.

The operation modes are as follows:

Normal Operation Mode

Dip Switch Setting: 3 off, 2 off, 1 off

In this mode, the DTU3005P will first wait for config-

uration from the Profibus host before initiating com-

munication with the configured SEAbus devices.

However, any SEAbus messages received on the

Passthrough port (Port 3) are passed through to the

SEAbus devices.

After configuration is received from the Profibus

host and data exchange is in progress, the LED on

the side of the unit will turn on. Data is transferred

between the SEAbus devices and the Profibus host.

The Status LED on the front of the DTU3005P is

green when in Data Exchange Mode with the Profi-

bus host and red at all other times when in Normal

Operations Mode.

Configuration Mode

Dip Switch Setting: 3 on, 2 off, 1 off

In this mode, the Profibus port (Port1) and SEAbus

port (Port 2) are not active. A Null-Modem cable (has

pins 2 and 3 crossed) is connected from Port 3 of

the DTU3005P to the personal computer running

the Configuration software.

The Status LED flashes green when in Configuration

Mode.

Note: Instructions for the Configuration Mode

are displayed on the personal computer’s

monitor whenever the Configuration soft-

ware is attempting to communicate with

the DTU3005P.

8.11 DTU3005P Port Status LEDs

The LED above each port flashes green when data is

transmitted and flashes red when data is received.

8.12 DTU3005P Port Pinouts

Port 1 is the Profibus port on the side of the unit and

has the standard Profibus pinout. Ports 2 and 3 have

both RS232 and RS422/485 signals available, but

connection should only be made to one set of sig-

nals at a time. The pinouts for both the 232 and 422/

485 modes are shown in Tab l e 8 . 7 .

Byte 16: SEAbus Device Data Error Count

(High Word, Low Byte)

Byte17: SEAbus Device Data Error Count

(Low Word, High Byte)

Byte 18: SEAbus Device Data Error Count

(Low Word, Low Byte)

Byte 19: Reserved (Set to 0 for now)

Byte 20: Reserved (Set to 0 for now)

Byte 21: Reserved (Set to 0 for now)

Byte 22: Reserved (Set to 0 for now)

Byte 23: Reserved (Set to 0 for now)

Table 8.6 Byte Format Sent to Profibus-DP Host

Table 8.7 Pinouts for RS 232 and 422/485

RS-232 Connection RS-422/485 Connection

Pin Signal Name Pin Signal Name

1 FG - Frame Ground 16 CTS -

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 119 120

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