JP2784391B2 - Time setting method of time management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time setting method for a time management system.

[0002]

2. Description of the Related Art A time management device (time recorder, time entry terminal, etc.) triggers some action to record and count the time as data, and literally has a built-in clock as a device for managing time. . Although this time management device may be used as a single device, with the development of communication technology and collective processing by computers, the number of cases in which a network is constructed and used as a terminal thereof is increasing. It is a computer that manages the time management device connected as a terminal on the network, and its processing level varies from a workstation class to a personal computer class. The management method of each time management terminal uses a method of performing various settings of the terminal and downloading data by transmitting a command from a computer.

FIG. 4 is a system configuration diagram of a conventional time management system. 1 is a host computer, 2 is a network cable, 3 is a time management terminal, and the command transmitted from the host computer 1 to each time management terminal 3 usually has a form as shown in FIG. I have. When a plurality of time management terminals 3 are connected on the network, each time management terminal 3 has a unique address, and the host computer 1 transmits the command form with an address at the beginning of the command form. Accordingly, each time management terminal 3 determines whether or not the time management terminal 3 is selected, and sets or corrects the time.

[0004]

At present, the accuracy of the clock incorporated in the time management terminal 3 is not excellent. The main reason for this is that the time management terminal 3 is composed of various LSIs, and among them, a dedicated LSI for managing time has reduced accuracy in order to reduce current consumption. Therefore, when a plurality of time management terminals 3 are connected on the network, the time may not be unified.

Since the command form transmitted from the host computer 1 has an address at the beginning, the time is set for each time management terminal. Therefore, the commands must be transmitted by the number of time management terminals 3.

An object of the present invention is to unify the times of a plurality of time management terminals connected to a host computer by forming a network.

[0007]

According to the present invention, a repeater having a clock with a higher precision than a clock built in the host computer and each time management terminal is provided between the host computer and each time management terminal. The above object is achieved by adjusting the time of each time management terminal by transmitting a command from the repeater.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment shown in the drawings.

FIG. 1 is a system configuration diagram of a time management system according to the present invention. 1 is a host computer, CP
U, ROM, RAM, etc., which control the entire system. 2 is a network cable, 3 is a time management terminal. 4 is a repeater, and FIG. 2 is a block circuit diagram thereof. The repeater 4 has a more accurate clock than the clock incorporated in the host computer 1 and each time management terminal 3 and a CP.
U, ROM, RAM, etc., and transmits time information obtained from the high-precision clock to each time management terminal 3.

[0010] By making the command transmitted from the relay device 4 to each time management terminal 3 into a form having no address at the beginning as shown in FIG.
Perform the same processing at the same time.

Next, the operation will be described.

In a time zone in which the host computer 1 does not perform much communication, for example, at night time, time information obtained from a high-precision clock built in the repeater 4 is managed by the command form of FIG. When the repeater 4 transmits to the terminal 3, each time management terminal 3 takes in the time and corrects its own clock. Therefore, since the time is set at the same time for each time management terminal 3, the time is unified. At this time, the relay device 4 transmits a suppression command to the host computer 1 so that the host computer 1 does not transmit the command.

[0013]

As described above in detail, the time setting method of the time management system according to the present invention uses a host computer and a repeater incorporating a clock with a higher precision than the clock incorporated in the time management terminal. since the provided between the time management terminals, set the time of each time management terminal by a command transmitted from the repeater, the host competent
The time of multiple time management terminals connected to the network can be unified collectively without depending on commands from the computer, and the time adjustment of the time management terminals
The burden on the host computer.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a time management system of the present invention.

FIG. 2 is a block circuit diagram of a repeater according to the present invention.

FIG. 3 is an explanatory diagram of a transmission command form according to the related art and the present invention.

FIG. 4 is a system configuration diagram of a conventional time management system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Host computer 2 Network cable 3 Time management terminal 4 Repeater

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-177989 (JP, A) JP-A-2-114358 (JP, A) JP-A-1-233900 (JP, A) JP-A-4- 32951 (JP, A) JP-A-1-221096 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 17/60 G07C 1/00

Claims (1)

(57) [Claims] 1. A time management system for connecting a plurality of time management terminals to a host computer and forming a network to collect data, wherein the time management system has a higher precision than a clock built in the host computer and the time management terminal. A time setting method for a time management system, comprising: providing a repeater having a built-in clock between a host computer and each time management terminal, and adjusting the time of each time management terminal by transmitting a command from the repeater. .