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GSC for Grasso reciprocating compressors, packages and chillers

GSC for Grasso reciprocating compressors, packages and chillers
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GSC for Grasso reciprocating compressors, packages and chillers - 1

Refri g eration Division >

GSC for Grasso reciprocating compressors, packages and chillers - 2

Copyright Grasso GmbH Refrigeration Technology The contents of this documentation and the enclosed drawings, sketches and diagrams are intended only for plant user and operating personnel. They may be neither duplicated nor divulged to third parties or firms without written consent. The technical data, figures, dimensions and weights presented in the documentation may be more closely defined or otherwise specified as a result of contractual agreement and are binding only after our confirmation in writing. The stipulations set forth in the contract have precedence over those in this...

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GSC for Grasso reciprocating compressors, packages and chillers - 3

Refri g eration Division FOREWORD 5 Introduction 5 1 DESCRIPTION OF THE GRASSO SYSTEM CONTROL 5 1.1 Grasso System Control - General 5 1.1.1 View 6 1.1.2 Lamps/ Push buttons 6 1.2 Operator terminal 7 General P & ID (Foreword) 7 2 CONTROL SEQUENCE 8 2.1 Operating modes 8 5 TECHNICAL DATA 9 5.1 Types of sensors used 9 5.2 Terminal connection diagram 10 5.3 Extended data communication (interfaces) 14 5.2.1 Customers input signals 10 5.2.2 CustomerҒs output signals 11 IO overview for a compressor package unit GSC version 1 (basic version) 12 IO overview for a compressor package unit GSC version...

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GSC for Grasso reciprocating compressors, packages and chillers - 4

Refri g eration Division >

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GSC for Grasso reciprocating compressors, packages and chillers - 5

Refri g eration Division FOREWORD Introduction Grasso has been producing refrigerating compressors and compressor units for a wide range of different applications for several decades. A new compressor control has been developed for universal use based on our many years operational experience. The compressor control, type ғGSC ( G rasso S ystem C ontrol) is a highly modern programmable controller, which is based on the Simatic C7-633 system. The GSC is suitable for controlling and monitoring our companyӒs products, based on screw and reciprocating compressors. For more detailed information...

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GSC for Grasso reciprocating compressors, packages and chillers - 6

Refri g eration Division 1Power supply 4 Emergency stop relay 2Profibus DP/DP-coupler 5 Motor start relay 3Socket-outlet for service 6 Bus Terminal Figure 1.1: View of outside of switchgear cabinet Figure 1.2: View of inside of switchgear cabinet 1.1.2 Lamps/ Push buttons White indicator light (Running) This indicator lamp flashes slowly when the compressor unit is in the Readyӓ state. This lamp flashes quickly during start up of the compressor. Once the compressor has started, the light becomes steady. This lamp flashes quickly during the shut down operation, until the compressor drive...

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GSC for Grasso reciprocating compressors, packages and chillers - 7

Refri g eration Division 1.2 Operator terminal The operator terminal is the interface between the operator and the control unit. All switching, operating and control actions are carried out via this operator terminal. system LED's function keys soft keys CPU operating mode setting digital keybord cursor keys system keys system keys LEDs General P & ID (Foreword) This diagram is intended to give a general overview of the measuring points provided. The supplied unit may deviate from this diagram. > 01.2004/ 1 638649_pi__gsc__gbr.doc - 7/16 size="-1">

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GSC for Grasso reciprocating compressors, packages and chillers - 8

Refri g eration Division 2 CONTROL SEQUENCE 2.1 Operating modes Operating modes Signal for ... Name Explanation Start/Stop Capacity +/- 0 Service Compressor motor blocked 1 Manual + Manual Manual control via OP Manual Manual 2 Manual + Auto Manual Start/Stop via OP and full automatic local capacity control Manual Auto 3 Auto + Auto Full automatic Start/Stop and local capacity control Auto Auto 4 Remote + HW (cont) Start/Stop and capacity demand via digital contacts (Hardware) from a remote Master controller. The GSC derives from the continuous +/- signals the pulses for controlling the...

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GSC for Grasso reciprocating compressors, packages and chillers - 9

Refri g eration Division 5 TECHNICAL DATA This technical data refers to the whole GSC control cabinet. Operating voltage 100 to 240 V AC Mains frequency 47 to 63 Hz Power consumption Maximum 300 W Control voltage 24V DC Voltage of solenoid valves 240 V AC (115 V AC optional) Type of protection IP 54 Permissible ambient temperature (storage) -20 to +70 C Permissible ambient temperature (operation) 0 to 50 аC * Maximum air humidity 5 to 95 % at 25 C (no moisture condensation) * Dimensions Width: 600 mm Depth: 210 mm Height: 600 mm Weight 36 kg * Additional measures required when outside these...

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GSC for Grasso reciprocating compressors, packages and chillers - 10

Refri g eration Division 294M > * +- +- ext. setpoint > I (4-20 mA) > - - 300PEW > * + + T ext. temperature > I ext. acknowledgementext. capacity increaseext. capacity decreaseext. start releaseext. unit on2nd setpoint aktiv(4-20 mA) 2 +24V214357P2.2PEW294 14357 > X32 11 1012PEPE 6 > V PE3PE2 1 PE6PE54 seperatorLevelGas sensorFlow switch 6 > L X08 PE9PE78 > P 3PE21 PE ext. Emergency stop2nd Safety pressure limiteror emergency stop > X50 - - 6 > + + II Motorcurrent PE 5 2 > X22 Incomming supply100 ... 240 V 50 Hz, N/PE Motor protectionMotor in delta(4-20 mA) N NL 31 1LPENPE+24V12 3 > X01

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GSC for Grasso reciprocating compressors, packages and chillers - 11

Refri g eration Division

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GSC for Grasso reciprocating compressors, packages and chillers - 12

Refri g eration Division >

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GSC for Grasso reciprocating compressors, packages and chillers - 13

Refri g eration Division >

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GSC for Grasso reciprocating compressors, packages and chillers - 14

Refri g eration Division 5.3 Extended data communication (interfaces) The GSC is equipped with an MPI interface as a standard. As this interface is an internal Siemens interface with multi-point capability, it can only be used between Siemens controls (S7). The MPI interface can be operated with a maximum transmission speed of 187.5 kBit/s, whereby the distance between 2 adjacent users must not exceed maximum 50 m. As an option, the GSC can also be fitted with a Profibus DP coupler (Master/Slave method). This bus protocol is standardised and can also be interpreted by other controls. With a...

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GSC for Grasso reciprocating compressors, packages and chillers - 15

Refri g eration Division Power supply and authorisation input Programming interface for OP > Figure 5.2: Interfaces C7-633, power supply and Author. connection The individual users can also be fitted with a bus cable connector. This connector is inserted directly in the bus interface (9-pin sub-D jack). The incoming and outgoing bus cable is connected in the socket via 4 terminals. The line termination resistance integrated in the bus cable can be connected via a switch. This is required at both ends of a network. We recommend bus cable connectors with vertical outgoing feeder cables. Line...

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