Grasso
Refri
eration Division
GRASSO SYSTEM CONTROL
01.2003/ 0 638660E_foreword.doc Foreword - 1
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 “GSC“ (Grasso System Control) is a highly modern programmable controller, which
is based on the Simatic C7-633 system.
The GSC is suitable for controlling and monitoring our company’s compressors.
Explanation of the abbreviations used
The following abbreviations are used in this manual.
Abbreviation Description
GSC
“Grasso System Control“ Type designation of the Grasso standard compressor control
CP
“Communication processor“
CPU
“Central processing unit“
DP
“Decentralised periphery“
Eco
“Economizer“
EPROM
“Erasable programmable read-only memory“
Ext.
“External“
RF
„Refrigerant“
RF-separator
“Refrigerant separator“
LED
“Light-emitting diode“
MAX
“Maximum“
MIN
“Minimum“
MPI
„Multi Point Interface“ Siemens internal, interface with multi-point capability on the GSC,
used for communication between several controls.
MRES
„Memory Reset“
SV
„Solenoid valve“
LVS
“Low Voltage switchgear“ — switchgear with power contactors for compressor motor, oil
pump and oil heating
OP
“Operator panel“ control and display device
PG
“Programming device“
PLC
“Programmable logic controller“
P & ID
“Pipe and instrumentation diagram“
General drawings
This drawing shows the general configuration of a piston compressor unit type “Grasso6210“ with economiser.
The supplied model can deviate from this.
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