MODEL: DLS

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

DLS SPECIFICATIONS

ES-6515 Rev.18 Page 3/10

DESCRIPTIONS

■ RUN Contact (LED) Behaviors

The LED operates when both the communication line conditions and DLS units conditions are true.

Comm. line conditions

Input units (00, A1, A2, G1 and P1): The LED turns ON with the network configured; OFF in an abnormality; the network is

reconfigured after an abnormality.

Output units (C1, C2, C3, C4, M1 and U1): The LED turns ON when data from the paired input unit is received normally, with

the network configured; OFF when the data is lost; turns also OFF in an abnormality in the network.

I/O-mixed units (E1, E2, R1 and S1): Functions of both input and output units are used.

DLS units conditions: The LED turns ON when the transmission is normal between the DLS units; OFF after three retries in a

transmission abnormality.

[CAUTION]

When the network is reconfigured e.g. by noise interference, the RUN LED and output for all units on the network turn briefly

OFF until they are turned ON after the reconfiguration is complete.

■ How to Caculate Transmission Speed

1. Data Volume and Transmission Time of I/O Unit

I/O type of DLS (or DLA1) units determines each unit's multi-transmission time. The DLS collects data from each station and

transmits to the other station.

(Input Model Suffix: Data Volume)

A1, E1: 30 bytes

A2: 60 bytes

G1, P1: 212 bytes

R1: 116 bytes

S1: 68 bytes

C1, C2, C3, C4, M1, U1: 0 bytes

Transmission time for 1 unit is calculated utilizing each unit's data volume.

Transmission time = (data volume) × (number of data bits per 1 byte ÷ transmission speed [bps]) + waiting time per unit (0.5

sec.)

[example] Transmission time of type A1, S1 and C1 units

•A1 unit (1200 bps)

30 × 12 ÷ 1200 + 0.5 = 0.8 (sec.)

•S1 unit (1200 bps)

68 × 12 ÷ 1200 + 0.5 = 1.18 (sec.)

•C1 unit 0 sec.

Transmission time for those units with 0 data

volume equals 0.

2. Start / End of Transmission

The DLS transmits codes to the paired station at the start and end of transmission sequence respectively. The data volume

differs according to modem type.

(Modem Type: MOD4/5; Others)

Start-of-transmission time: 7 bytes; 2 bytes

End-of transmission time: 6 bytes; 2 bytes

Start-of-Transmission time = (data volume) × (number of data bits per 1 byte ÷ transmission speed [bps]) + waiting time per

unit (0.1 sec.)

Remark: Waiting time for MOD4 and MOD5 is 0.3 sec.

[example] Modem type /M5A (1200 bps)

2 × 12 ÷ 1200 + 0.1 = 0.12 (sec.)

End-of-Transmission time = (data volume) × (number of data bits per 1 byte ÷ transmission speed [bps]) + waiting time per