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RG-SDMOD 10

Drive Setup & Operation

4.5 Unlocking & Locking Controls

Registers #48 and #1 are used in Unlocking and Locking Controls.

• A write to Register #48 (Unlock Controls) with a value of 0 will unlock controls. This enables the writing

of Register #1 – the Drive Control Register and register #40 (keypad speed command).

Note: C01 must be set to either 10 or 11 in order to unlock serial control.

• If Register #48 (Unlock Controls) is written with a value that is the Drive’s Programming Password,

C94, then in addition to Register #1(Drive Control), writing to all other writeable registers is enabled

(e.g.: parameter C37 -- Preset Speed #1). The factory default password for

smd

series drives is 0.

• Once Register #48 (Unlock Controls) has been written, Controls are unlocked until Register#1 bit 1

(Lock Bit) has been written, Parameter C01 is changed to a value different than 10 or 11, the drive is

powered down or a serial timeout occurs.

• Writing to Register #1 (Drive Control) with bit 1 set will Lock both Controls and Parameters (prevents

writing to any register).

• When LOCK is asserted, the drive drops out of SERIAL control. After receiving the WRITE message

when serial control is locked, the drive will return exception code 01.

• Even though drive might be locked, and thus parameters and control cannot be written, parameters

and status can always be read. Refer to section 4.7,

Monitoring Only Operation

4.6 Unlocking & Locking Programming Parameters only

Registers #49 and #1 are used in Unlocking and Locking Programming Parameters.

• Writing to any writeable register other than #1 can be enabled by writing the Drive’s Programming

Password (C94) to Register #49 (Unlock Parameters). This would be done when Drive Control (start,

stop, etc.) is not required.

• The Factory Default password is 0.

• Once Register #49 (Unlock Parameters) has been written, the writing of parameter registers is unlocked

until Register #1bit 1 (Lock Bit) has been set or the drive experiences a serial timeout.

4.7 Monitoring Only Operation

1. Power up drive.

2. Set parameter C01 (Control Source Setpoint) to selection 8 or 9.

3. Simply read

smd

4. No unlocking or watchdog issues apply for monitoring.

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com

Lenze SMD Series Reference Guide

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