Siemens EK 726 Series Manual de Serviço descarregar pdf (Página 82)

COMMUNICATIONS / INTERFACES

MICROMASTER

MICROMASTER Vector

MIDIMASTER Vector

SIEMENS DA 64 – 2001/2002

Version C4 4/6

Multi-mode operation is possible: Control data can be input

via the terminal strip (digital inputs) and setpoints via the

serial bus. Alternatively, the setpoint can be received from a

local source (analog input), whereby the drive is controlled via

the serial bus.

· All of the drive parameters are accessible via the serial

connecting cable.

The PROFIBUS module fits perfectly onto the drive operator

panel and can be easily removed by lifting a bracket below

the unit.

Notes:

1. The PROFIBUS module may only be plugged onto the

drive inverter or withdrawn from it when the drive inverter

is in a no-voltage condition (i.e. powered-down).

2. If the PROFIBUS module is inserted in the SUB-D

connector of the operator panel, the internal RS 485

terminals of the 6SE32 drive inverter (terminals 23 and 24)

may not be used.

3. The PROFIBUS module may not be connected to the

drive inverter using a cable.

4. The PROFIBUS module cannot be simultaneously used

with the plain text operator panel.

Either a PPO, type 1 or PPO, type 3, according to the

specifications in VDI/VDE 3689 may be used for

communications via PROFIBUS-DP. In practice, this means

that process data (control words, setpoints in the transfer

telegram and status words, actual values in the receive

telegram) are always sent. However, parameter data transfer

can be inhibited it the bus bandwidth or the PLC memory

space is restricted. Generally, the data structure and thus the

PPO type are specified by the bus master. If a PPO type is

not specified (e.g. if a combined PROFIBUS DP/

PROFIBUS FMS bus master is used), the standard PPO type

= 1 (parameter data transfer).

Process data, from the serial link, always has a higher priority

than the parameter data. This means that a setpoint or drive

control change command is processed faster than a

parameter change command.

The parameter write access via the serial link can, when

required, be enabled or inhibited. The parameter read access

is always enabled so that drive data, diagnostic and fault

messages etc. can always be read-out. This permits a low-

cost display system to be implemented.

The drive can be locally controlled using ON, OFF, JOG and

direction of rotation reversal at any time as if the module was

not installed.

The PROFIBUS cable is connected to the 9-pin SUB-D

connector on the PROFIBUS module.

Fig. 5: Pin arrangement of the PROFIBUS SUB-D

connector

Pin Function, information

1 Not assigned

2 Not assigned

3 RS485 send and receive data line, two-

wire, positive differential input/output B/P

4 Switch-on the send section ("request- to-

send" RTS)

5 Reference potential, 0 V

6 Insulated power supply, 5V, for the

terminating resistors

7 Not assigned

8 RS485 send and receive data line, two-

wire, negative differential input/output A/N

9 Not assigned

Table 4: Pin assignment of the SUB-D connector

The cable shield should be connected to the housing of the

SUB-D connector. The following cable lengths and data

transfer rates are possible:

Data transfer s

rate (kbit/s)

Max. cable length of a

segment (m)

9.6

19.2

93.75

187.5

500

1500

12000

1200

1000

400

200

100

Table 5: Max. cable lengths and data transfer rates

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 119 120

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