Setting save command to 1S drive from Power PMAC

Summary/Issue Description

Changes to EtherCAT SDOs in the 1S drive made in PMAC programs will be lost on a drive power cycle unless the “Store Parameters” SDO is written with the “save” argument value.

Solution

A value of 65766173h (ASCII "e" "v" "a" "s") written to SDO 1010h (Sub Index 01) is used to execute a save to FLASH on the 1S drive. The 1S Drive manual reports the following about this SDO:

• A value of 00000001 hex (command valid) is given when reading.

• If a value other than 65766173 hex is written, an ABORT code is returned.

• Writing to the non-volatile memory may take up to 10 seconds. This is when all objects are changed.

• There is a limit to the number of times to write to the non-volatile memory.

PMAC’s EtherCAT Network Function “ecattypedsdo()” is used to send this SDO value.

Code (snippet) as in the following can be used:

#define READ 1

#define WRITE 0

local slaveIndex = {slave index value}

local rwMode = WRITE

local writeValue = $65766173

local readValue 

readValue = ecattypedsdo(0,slaveIndex,rwMode,$1010,$01,writeValue,4) //write “$65766173” to index $1010-01.

Date/Revision History

First review 11/21/2025 V1.0

Author:

Stephen Milici, Technical Support Specialist"

References

https://assets.omron.com/m/76e3f5e50c46e0e9/original/Power-PMAC-Software-Reference-Manual.pdf

https://assets.omron.com/m/0bd037057bb5adc1/original/1S-Series-EtherCAT-Communications-User-Manual.pdf