Reference Manual

PMAC 2 Software Reference

PMAC On-Line Command Specification 265

MACROAUXWRITE

Function

Write MACRO auxiliary parameter value

Scope

Global

Syntax

MACROAUXWRITE{NodeNum}{ParamNum}{Variable}

MXW{NodeNum}{ParamNum}{Variable}

where:

• {NodeNum} is an integer constant from 0 to 15 specifying the slave number of the node

• {ParamNum} is an integer constant from 2 to 253 specifying the auxiliary parameter

number for this node

• {Variable} is the name of the PMAC variable (I, P, Q, or M) from which the

parameter value is to be copied

Remarks

This command permits PMAC to write auxiliary register values to slave nodes across the

MACRO ring. The command must specify the node number of the slave node, the auxiliary

parameter number at this node, and the name of the PMAC variable from which the value

comes.

Only one auxiliary access (read or write) of a single node can be done on one command line.

In order to access the auxiliary registers of a MACRO node n, bit n of I1000 must be set to 1.

If the slave node returns an error message or the slave node does not respond within 32 servo

cycles, PMAC will report ERR008. Bit 5 of global status register X:$0003 is set to report

such a MACRO auxiliary communications error. Register X:$0798 holds the error value. It

is set to $010000 for a timeout error, or $xxxxFE if the slave node reports an error, where

xxxx is the 16-bit error code reported by the slave node.

Example

MACROAUXWRITE1,24,P1 ; Write value of P1 to Node 1 Parameter 24

MXW5,128,M100 ; Write value of M100 to Node 5 Parameter 128