MODEL: 22LA1

http://www.m-system.co.jp/

22LA1 SPECIFICATIONS

ES-6554 Rev.8 Page 3/22

C) Computer interface: Set address numbers to correspond with the computer as I/O module.

■ Transmission Time

Integrate all the transmission time for each process input (or I/O-mixed) module in the system.

•Contact input, BCD, 16 points (A2) 1.5 msec.

•Contact input 8 points (A4) 1.5 msec.

•Contact I/O each 4 points (E5, E6) 1.5 msec.

•Analog input 8 points (G3) 12.0 msec.

•Analog input 4 points (G4) 6.0 msec.

•Pulse input 4 points (P4) 6.0 msec.

An analog module does not transmit all its signals in serial but does 1 point per each cycle. For example, when 1 contact input

module (8 points) and 1 analog input module (4 points) are connected, 8 point contact signal and 1 point analog signal are

transmitted in turn. One cycle time is therefore calculated as:

4 points × 1.5 msec. + 6 msec. = 12 msec.

This method is beneficial for giving a priority to contact signals which vary rapidly.

■ Transmission line configuration

The multi-drop transmission line containing 22LA1 and DLx units should meet the following conditions.

Contact M-System's sales office or representatives when designing.

A) 10 kilometers

at maximum in total system.

B) Line consists only of 22LA1 modules

: one multitransmission line can contain at the maximum of 16 units within the total

C) 22LA1 modules plus link adapter (model: DAL4)

: DAL4 units can expand the total distance. (8 DAL4 units max.)

D) 22LA1 modules plus DLx units

: the total distance of a section consists of 22LA1 modules is less than 500 meters. The 22LA1

1

A

L

2

2

1

A

L

2

2

DAL4

DAL4

22LA1

22LA1

22LA1

DLA1

DLA1

modules can be connected to DLx units via a DLx-7 unit. (Eight DLx-7 units max.)

distance of 500 m.