US 5,349,673 AGranted

Master/slave system and its control program executing method

AssigneeKabushiki Kaisha Toshiba

InventorSusumu Yasuda

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Abstract

A master/slave system which includes an electronic exchange as a master device and various types of terminal units as slave devices connected to the electronic exchange. The electronic exchange is arranged to supply, at the time of a slave device is started, a program for managing and controlling the slave devices to the started slave device. In the system, for example, a control program describing only a control procedure common to the slave devices is stored in the master device and other control programs each uniquely corresponding to each of different specifications of the respective slave devices are stored in the respective slave devices, whereby the size of the control program stored in the master device can be minimized.

Claims8

Dependent claims

A master/slave system including a single master device and a plurality of different types of slave devices connected to said master device, the operation of each of said slave devices being controlled and managed by said master device through control programs corresponding to each of said slave devices, said master device comprising:

memory means for storing therein a first control program constituting a part of said control programs, said first control program describing a control procedure common to said plurality of slave devices;
and
first communication means for transmitting said first control program to said slave devices,
each of said slave devices comprising:
second communication means for receiving said first control program transmitted from said master device;
a first program memory for storing said first control program;
and
a second program memory for previously storing therein a uniquely associated one of a plurality of second control programs which constitute parts of said control programs, each of said second control programs describing a unique control procedure corresponding to a unique specification of the slave device in which the second program is stored,
wherein said master device generally manages and controls the operation of said slave devices through said first control program transmitted to said slave devices, and each of said slave devices interprets the contents of said first control program through the unique control procedure of the second control program stored in said second program memory.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/557,458Filed 25 Jul 1990
Priority: JP 1-19385728 Jul 1989
Granted: 20 Sep 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G06F 13/4022
Coupling between buses: using switching circuits, e.g. switching matrix, connection or expansion network
H04L 9/40
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: network security protocols
G06F
Computing and data processing
H04L
Digital communication

Family

No related US applications are recorded in the indexed filing history.

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