c amit siemens ge comparisons (1)

8/9/2019 C Amit Siemens GE Comparisons (1)

1/13

Comparison between Siemens and GE-Fanuc

Redundant Systems


2/13

System Configuration

GE-Fanuc (90-70)

Siemens S7300/400


3/13

GE-Fanuc System Configuration


4/13

Siemens System Configuration Option-1

Redundancy area

MPI, PROFIBUS DP, Ethernet

Connection to redundantcomponents

Mastercontroller

Back-upcontroller

Redundancy area


5/13

Siemens System Configuration Option-2

MPI/PROFIBUS/ Ethernet

Mastercontroller

Back upcontroller

OLM

OLM

OLM

OLM

ET 200 MCC-1

Profibus-1

Profibus-1 Profibus-2

Profibus-2

Profibus-2

ET 200 MCC-2

ET 200 MCC-3

Profibus-1

I/O Connected in STAR TOPOLOGY


6/13

With GE-Fanuc

With Siemens

No such constraint. ET 200M stations and the CPUs can be

placed as per plant layout.

Benefit to Customer due to Siemens: Need to run cables onlyas per the layout in bus topology.

Disadvantage to Customer due to GE-Fanuc: Need to run

additional cables to remote drop to maintain the sequence


7/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: If one IM fails other IMis available. Should both IM fails only 8 I/O modules are lost.

Disadvantage to Customer due to GE-Fanuc: If Bus SwitchingModule fails the entire system fails.

ET 200Mwith active Bus modules

RedundantIM 153-2RedundantIM 153-2


8/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: No additional component

required in the system. No risk.

Disadvantage to Customer due to GE-Fanuc: Additional

component and loss of data to both the active and standbyCPUs

No such constraint. The entire cable is a standard Shielded

twisted pair Profibus cable.


9/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: No additional componentrequired in the system as spare.

Disadvantage to Customer due to GE-Fanuc: Additional

component required to be maintained as inventory

The remote I/Os are connected to integrated port of each of

the CPUs.

SAME DEGREE OF SYSTEM AVAILABILITY WITH

BOTH SIEMENS and GE-FANUC


10/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: Only one of the I/O racks

could not be communicated.

Disadvantage to Customer due to GE-Fanuc: If cable from

BSM fails, all the blocks fail. System failure if CPU (primary)

with address 31 fails.

The Connection from PLC to remote I/Os are on STAR

NETWORK. Thus simultaneous failure of every connection is

not possible.

Only If Primary PLC (GBC with address 31) is active and ifstandby PLC fails and one of the bus available, system

continues to operate


11/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: No Interruption in

Process

Disadvantage to Customer due to GE-Fanuc: Interrupt in

Process

Primary to Standby Transfer and Vice-Versa is a bumpless

transfer

Primary to Standby Transfer is with Bump in case of GE-Fanuc.


12/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: Easy Programming and

Maintenance

Disadvantage to Customer due to GE-Fanuc: No, Module-wise

error diagnostics and thus difficulty in Maintenance

Module-wise Diagnostics possible.

No option of Module-wise diagnostics with standard module


13/13

With GE-Fanuc

With Siemens

Benefit to Customer due to Siemens: Faster Update times thus

better control. Easy Expandability

Disadvantage to Customer due to GE-Fanuc: Slower Update

times and thus inferior control.

Profibus-DP operating Baud rate : 187.5 Kbps for 1200m

Length and supports 125 nodes (with 3 Repeaters) Max-Baudrate on Profibus : 12 Mbps

Genius Bus Max.operating Baud rate: 153.6 Kbps for 1066mLength with 32 nodes

c amit siemens ge comparisons (1)

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