Delta RMC101 User Manual download pdf (Page 700)

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101

RMC100 and RMCWin User Manual

A-48

the Bias Drive command. The possible values are:

Mode 1

The Pressure Set A and Pressure Set B fields use units of millivolts per millisecond. For example, if

the current Bias Drive is 0 volts, the Command Value is 1000 millivolts, and the Pressure Set A field

is set to 50, it will take 20 milliseconds for the Bias Drive to reach 1000 millivolts.

Mode 3

The Pressure Set A and Pressure Set B fields are given in milliseconds. For example, if the current

drive output is 0 millivolts, the Command Value is 1000 millivolts, and the Pressure Set A field is 50,

then it will take 50 milliseconds for the Bias Drive to reach 1000 millivolts.

Command Value (Requested Drive):

This value gives the number of millivolts to ramp the Bias Drive up or down to. The ramping of the

Bias Drive will begin as soon as the axis is in pressure monitoring mode, however this Bias Drive

will not actually be added to the output drive until the axis begins regulating pressure.

Note: Using this command requires overwriting the Mode, Pressure Set A and Pressure Set B

fields. If this is done using a full command profile from the Event Step table, then the current

pressure fields will not be messed up. However, these fields must be restored to their intended

values when the next Set Pressure command is issued.

A.2.2 Start Events Command

Character: E

Decimal: 69

Hexadecimal: 0x45

Command Value: Event Step to Start Execution

This command starts an event step sequence at the step specified in the Command Value field. If

the axis already was in the middle of an event sequence, that sequence will end and the new

event sequence will begin.

Note: RMC100 CPU Firmware dating prior to 19980414 supports event sequences only on

position axes. Issuing this command to a pressure or force axis will result in a parameter error.

A.2.3 Set Mode Command

Character: M

Decimal: 77

Hexadecimal: 0x4D

Command Value: New Mode value

This command is used to change the Mode for the current command in one of several ways. The

changes take place immediately. The allowed bits (described below) are copied from the

Command Value to the Mode field for this axis. The following Mode bits can be changed with this

command:

• Gearing Type Bit (bit 14) and Gear Master Select Bits (bits 4-6):

If the axis is already gearing to another axis, then these bits can be changed to switch

immediately to gearing to another axis or position quantity. Changing these bits when the axis is

not already geared will have no effect. The gearing bits cannot be changed if the axis is gearing

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Delta RMC101 User Manual Page 700

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