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Mint™ v4 Advanced Programming Guide

30 MN1270 02.2002

Controllers Supported:

NextMove PCI NextMove PC NextMove BX MintDrive ServoNode 51

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Format:

ADCMAX.channel = <expression>

v = ADCMAX.channel

Dot Parameters:

Channel – ADC Channel Number

Attributes:

Controller Read Write Command Multi-

Axis

Scaled Default Range

NextMove

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100

-100 ≤ x ≤ 100

Description:

It is possible to attach limit values to analog input channels such that if those limits are exceeded, a

motion error is generated. Analog channels can be associated with one or more axes and an axis can

have multiple analog channels associated with it.

The

ADCMAX keyword sets the upper limit value for an analog channel to a percentage of its maximum

value. The value must also be greater than then lower limit value set with

ADCMIN. The limit value

cannot be set on an analog channel that is configured as off.

In order for an analog channel to generate a motion error, it must be attached to an axis. This is done

with the

ADCMONITOR keyword. If the analog value then exceeds the upper or lower limit, a motion

error is generated on that axis and all other axes that are monitoring that analog channel.

In the event of a motion error, the axis is crash stopped and the drive and enable relay disabled. The

user defined error handler, #ONERROR, will be called if it is defined.

The

ADCERROR keyword can be used to see which analog channels have caused an analog motion error

on an axis.

Example:

ADCMAX.0 = 50

ADCMAX.2 = 75

ADCMIN.0 = -50

ADCMIN.2 = -75

ADCMONITOR[0,3,5] = 5;

This sets the upper limit on channels 0 and 2 to be 50% and 75% respectively and the lower limit on

channels 0 and 2 to be –50% and –75% respectively. Axes 0, 3 and 5 are set to monitor channels 0 and

2. Therefore if the value on analog channel 2 reached 51%, then axes 0, 3 and 5 would incur analog

motion errors and reading the

ADCERROR keyword for these axes would return a value 4, indicating

analog channel 2, upper limit.