JPS5985158A - Terminal control system - Google Patents

Abstract

PURPOSE:To suppress the operating peak load of a central processing unit by providing a means dividing a terminal into plural groups in advance to the central processing unit controlling plural terminals by the polling system. CONSTITUTION:The central processing unit of conventional type comprising a central controller CC, indicated telegraphic message CD transmitting section CDS and a data request signal processing section ADP is provided with a grouping section GP grouping the terminal TM and a group processing section GPE monitoring the end of group processing. A CD transmission command from the central controller CC reaches the section CDS and transmits a CD signal. The grouping section GP transmits, e.g., a CDiG to a terminal of the 1st group. When a response signal RDGiG exists, the end of CD transmission of the 1st group is informed to the GPE. The GPE starts the ADP. Thus, the control by group is attained in this way, then the peak load of the central processing unit is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a terminal control method in which one central processing unit controls a plurality of terminals using a polling method, and has been used in the past to suppress the operational peak load of the central processing unit. 0 (21) Prior Art and Problems Regarding the terminal control system that can The main control unit aC is the instruction message sending unit Cl.
Instruction message (j I) to all terminals TM for Os VC
instructs to send out. The instruction message sending unit CDS sends an instruction m and a message OD1 to each terminal TM via the terminal ink face TIN.
and receives a response signal ROI)i. This instruction message sending unit 0DF3 also receives a response signal RCD from the last terminal when all instruction messages OD' and l have been sent.
], the main side fli1 indicates that the CD is complete.
Department Ca will be notified. The main control unit Ca then activates the data request signal processing unit ADP. At this time, the data request signal processing unit ADP sends out the alignment signal ENQ and the data signal RD1- at different times, and the terminal TM sends out the data request signal ADi and the received signal ACJ at different times. Receive. This and lt are both terminal interface TI
Performed via N. In the Quimchard shown in FIG. 2, the central processing unit OPU (referring to the entire processing unit σ including the main control unit aa in FIG. 1) operates each terminal TM (terminal TMI, TM2. ) When performing control such as launching a K IJ strike,
The original instruction message (control data) is on the CD for all terminals TM.
+ - So-called polling activation is applied to TM11VC.

σ from the central processing unit CPU to the terminal TM in FIG.
) ν5 line is the instruction message CD+ K for the first terminal TM+
The response signal ROI to CD Utsukuda is activated.
)l is returned 1- Indicates that (・ru.Central processing unit C
Immediately upon receiving the response signal n0D1i, the 1PU issues an instruction 1) 11 sentence CD7 to the second terminal TM2 (indicated by a dashed line) and activates the second terminal TMI. Therefore, the second terminal TM2 returns a response signal ROD2.

The instruction message CD is sent to all terminals TJ to T Mn, and when the six central processing units CPU receive the response signal RODnt from the terminal 'I'Mn, the CPU then sends the first
A timing signal ENQj is sent to the terminal TM1. Since the first terminal Tλ (1 digit central processing unit apuK has been called, the central processing unit CPU issues a data request signal ADj. After receiving this data request (No. 4 AD1 missing (it), it sends a turn RD+ for the first terminal. The first terminal TM1 receives data,
When RDl is successfully received, a received signal AOK1 is sent back 1'. The central processing unit CPU then sends the timing signal ENQ2 to the second terminal TM2.
The terminal TM2 operates in the same manner as the first terminal TM1. Each terminal TMK is provided with a time monitoring timer (not shown).The timer starts operating when the response signal RC1] is returned to the central processing unit CPU, and the timer starts operating when the response signal RC1] is returned to the central processing unit CPU. Time T taken after the time required for the series of exchanges: signal AD → data nD → received signal AOK
It ends at t. This timer monitors the time of the VC terminal operation described below. As shown in FIG. 2, the timer time Tt1 of the first terminal ends at [2] after the second terminal's received address CK2 is returned. The timer time Tt2 &"JTt1 in the second terminal TMK is set to be slightly longer. This is because the time from lQ1 to ENQ2 is longer than the time after 9 OIh signals when GDz is received. Uncontrolled υJKTt cannot be extended 1- for terminals TM3 and beyond.This is because it is necessary to find faults in the central processing unit CPU, transmission line, etc. Also, if the central processing unit GPU
When polling is activated for all terminals as an operation, data request signals AD are issued from almost all terminals depending on the presence or absence of data to be processed.

Therefore, since the central processing unit CPU performs the sequence of analysis, data preparation, and analysis of the received notification AD, the operation of the central processing unit CPH is different from the case where there are many terminals returning. The load will be heavy. Therefore, the central processing unit CPU, which handles a huge number of terminals, takes into consideration the normal operating rate of the terminals with and without data. ! .

The process may or may not be completed within the turnaround time determined by 1. Cru. In order for the central processing unit CPU to be able to operate satisfactorily even with such a heavy load,
The equipment had to be of higher performance, which of course made it more expensive.

(3) Purpose of the Invention The purpose of the present invention is to improve the above-mentioned drawbacks and to provide a terminal control system that can operate with a reduced peak load even when using a central processing unit with the same level of performance as the conventional one. to k).

(4) First aspect of the invention The configuration of the present invention to achieve the above-mentioned object is that in a terminal control method in which one central processing unit controls a plurality of terminals by a polling method, the plurality of terminals are controlled in advance. nog/l
= - after the control of the group is completed, the next group/
The goal is to start controlling rape.

(5) Embodiment of the Invention In the embodiment of the present invention, all terminals are divided into a plurality of groups, and control is performed so that the clearing process is first performed with the terminals that belong to the initial group. 1-ru. After the first group is finished, select the next group's terminals. In such a case, the waiting time monitoring timers can be adjusted to the same extent for each terminal, and the value can be easily selected so that the last terminal in the group will not time out. FIG. 5 is a block diagram showing the main components of the central processing unit CPU shown in correspondence with FIG. 1.
. Same as No. 11y<1 4]” indicates the same thing (2,
+; PJ, the part ap that monitors the completion of group processing groups terminals (, - CD mail-1 will be sent out.

Grouping unit GP In VC, predetermined groups B and U
For example, the CD signal (jJ
yG'i; Send. This transmission is carried out via the terminal interface TIN'5; and the response signal -'i inC
When the response signal CDIG is received from the terminals belonging to the first group, the grouping unit 0P processes the response signal CDIG from the predetermined number of terminals belonging to the first group. Notify the Group Processing Supervision Department GPE that the group's CD count signal has ended ( =
Ii'4G).

Therefore, the monitoring unit GPF, IL'! , the data request signal processing unit ADP starts (signal 0). The data request signal processing unit AD'P sends instruction signals ENQ,iG to the terminals of the first group, and sends data request signals ADi,C from the terminals.
When - is returned, Deke RD1GtX: Must appear -(Ru.

(2'? IILg?) is to return the received fc number A (jK1cθ) from one terminal. Above each signal (・Kotsui I sends/receives to group/1.-group, Tame IG
-1 is added to indicate)'-") When the Omi group processing is completed! i Mill River flow double signal guts 1-Butar management monitoring unit 0βE・\ Notify. The monitoring unit GPE and grouping unit C
Terminal i pair of the 1st-2nd group to P (1, instruction 11°C starts sending the sentence CD to C.

Figure 4 shows )'j when the terminals are divided into two groups.
('', 515 telσ) Shows the working Thai person.

r) tG l and i'MG l are the terminals of the 1st group and the 102nd group, respectively, and for each group, the operation is the same as in the 10th case. j Now.

(6) 0 result of origin IJl'j In this way, according to the invention, the terminal is divided into groups of number of frequencies: 'rQi By easy means, 1itlJ irl'Il 'j' rows for each group! 'Youkari 1
The central processing unit becomes busy and the peak load is suppressed. In other words, the processing time for analyzing and responding to data request signals from each terminal becomes long depending on the number of terminals, and the initial setup (
This is because the number of terminals can be limited and grouped so as not to exceed the turnaround time of the central processing unit.

Furthermore, since the waiting time monitoring timers of each terminal can be adjusted to the same degree and operated, an effective system can be constructed using a central processing unit and terminals that have performance comparable to that of conventional systems.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the main parts of the central processing unit in the conventional terminal open side J method, FIG. 2 is an operation time chart for FIG. 1, and FIG. FIG. 4 is a block diagram of the main parts of the central processing unit shown in correspondence with rotation pressure, and FIG. 4 is an operation time chart for FIG. 3. C1PU... Central processing unit TMG I, TMG 1... 1st group, 2nd
Group terminal GPE...Group processing unit aC.
...Main control unit cp...Grouping unit cns...
CD output department TIN...Terminal interface department/Samurai Kideha 1 person Hatashi) 1ha Co., Ltd. Representative Person Patent attorney Eisuke Suzuki

Claims (1)

[Claims] In a terminal control method in which one central processing unit controls a plurality of terminals by a polling method, the central processing unit is provided with means for dividing the terminals into a plurality of groups in advance, and after the control itl of the group is completed, the next A terminal control force type characterized by starting control of a group.