ASI RM2000 Funzionamento - Pagina 13

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persistent using the "SS Z" command, which saves all parameter settings to nonvolatile ﬂash

memory. Users wishing to make a one-time permanent change to a parameter setting can use a

terminal program to communicate with the controller, make the parameter change, and then make

the change persistent with the "SS Z" command. The new parameters will be used on subsequent

power down/up or controller RESET. The user can restore the Factory Default parameter settings any

time using the serial command "SS X".

Saved Stage Positions, Limit and Home Positions

The controller watches the power line voltage so that it can detect when the controller is being turned

oﬀ. There is suﬃcient stored charge in the controller's power supply to allow the controller to save the

stage position and a few other variables as power is being shut down. The variables that are saved

are the Stage Axis positions, the programmable Upper and Lower limit locations, and the Home

location all expressed in the current coordinated reference system. When power is restored, the

controller loads the saved information into its working memory and clears the data from the Saved

Position nonvolatile memory locations to ready those storage locations for when power is again shut

oﬀ.

Successful shutdown is indicated by "OK" broadcast on the serial port upon power-oﬀ.

Internal I/O connector details

Special user requirements often require custom external wiring. The MS 2000 WK controller has an

internal board connector with several I/O lines that are often wired to the external BNC connectors for

user connections. There may be occasions where the functions required are not wired to external

connectors. The table below shows the connector wiring and the ﬁrmware modules that are required

to take advantage of the I/O functions. The BU X command will list which modules are present in the

loaded ﬁrmware. On most controllers the IN BNC is connected to TTL IN0.

EXT I/O – SV1

PIN DESCRIPTION FUNCTION

TTL IN0

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If the controller is RESET (without turning oﬀ the power)

current locations are NOT saved, and the controller will come

up with axis positions at zero and default Limit and Home

positions; the Saved Position information will be lost.

INPUT-TTL input w/

processor interrupt (Usually

wired to the IN BNC)

MS2000, MFC2000 and RM2000 OPERATION

FIRMWARE Modules

IN0_INT used for external TTL triggered tasks – see

TTL command for speciﬁc functions.

ENC_INT use to count encoder pulses (selected

with JP2) in conjunction with SCAN ﬁrmware.

TTL_REPORT_INT used for triggered position

reporting.