MODEL: MXAB

MXAB SPECIFICATIONS

ES-1747 Rev.10 Page 6/7

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

FUNCTIONS

■ Output at Start-up of the MXAB

The following shows the output value at start-up of the MXAB and after switching of mode of the Stop.

• Output when Stop-mode is AUTO at Start-up of the MXAB

MANUAL control

mode (ITEM 13)

Trace-back time

(ITEM 15)

Output stored

at loss of power

(ITEM 17)

Before switching of

Stop-mode (AUTO)

Output after switching of the Stop-mode from

AUTO to MANUAL

Before Trace-back

time passes

After Trace-back time

passed

1

(Fixed value mode)

No effect

1: Enable

Proportional to

input value

Fixed value preset in the ITEM 14

0: Disable

0

(Trace-back mode)

0

Don’t care

The value at the time of the Stop-mode

switched

Other than 0

1: Enable

The value stored

at the loss of

power

The value retroactive

to the preset time pe-

riod in the ITEM 15

0: Disable

The value preset

in the ITEM 18

• Output when Stop-mode is MANUAL at Start-up of the MXAB

MANUAL control

mode (ITEM 13)

Trace-back time

(ITEM 15)

Output stored

at loss of power

(ITEM 17)

Before switch-

ing of Stop-mode

(MANUAL)

Output after the Stop-mode is switched

back from AUTO to MANUAL

Before Trace-back

time passes

After trace-back time

passed

1

(Fixed value mode)

Don’t care

1: Enable

The value stored at

the loss of power

Fixed value preset in the ITEM 14

No effect

0: Disable

The value preset in

the ITEM 18

0

(Trace-back mode)

0

1: Enable

The value stored at

the loss of power

The value at the time of the Stop-mode

switched

0: Disable

The value preset in

the ITEM 18

Other than 0

1: Enable

The value stored at

the loss of power

The value stored

at the loss of

power

The value retroactive

to the preset time pe-

riod in the ITEM 15

0: Disable

The value preset in

the ITEM 18

The value preset

in the ITEM 18

■ MXAB Used in Combination with ST/STL

In normal operating mode, the MXAB responds proportionally to its input (the computer output) in the response time of less

than 0.5 seconds.

If the computer fails, the “STOP” command will override computer output and put the unit in the manual operation mode by

the ST/STL. Using the top-mounted UP or DOWN key, output can be increased or decreased in the preset ramp rate. Output

signal value can be read on the top-mounted indicator. For more precise control, use the monitor terminals.

Also the computer input can be overridden with the AUTO-MANUAL selector on the Soft-Terminal.

■ Basic Operation (operation in default setting)

In normal operating mode, the MXAB responds proportion -

ally to its input (the computer output) in the response time

of less than 0.5 seconds.

If the computer fails, this will be detected as a “STOP”

command and output will be held at the value prior to the

breakdown. You can increase the output signal by closing

across the terminals 9 – 11, and decrease it by closing 10

– 11. The output responds in the preset ramp rate.

COMMAND

TERM.

SIGNAL STATUS

Computer

DC Signal

5 – 6

↑ ↓

STOP

3 – 4

1 1 0 0 0 0 0 0

ST/STL

UP

9 – 11 – – – – 1 0 0 1

DOWN

10 – 11 – – – – 0 1 0 1

Output of the MXAB

1 – 2

↑ ↓ H H ↑ ↓ H H

[Keys] 1 : ON

0 : OFF

– : ON or OFF

H : Hold

↑ : Increase ↓ : Decrease

■ Output after the Switching from AUTO Mode to MANUAL Mode

The output changes according to the ITEM 13.

When the ITEM 13 is 0, the output is the value retroactive to the preset time period in the ITEM 15.

When the ITEM 13 is 1, the output is the value preset in the ITEM 14.

■ Output Stored at the Loss of Power

When the ITEM 17 is 0, the output value at the loss of power is stored.

When the ITEM 15 is other than 0, the output value retroactive to the preset time period in the ITEM 15 is stored.

When the Stop signal is in MANUAL mode at power recovery, the output is the stored value.