Lenze ESVZAR0 RS-485 - Manual (Page 20)

18 CMVMB401C
Network Applications
8 Typical Network Applications
8.1 Controlling the Drive
The following is the sequence of events to start the drive via the network:
1. Unlock the Drive Control register (#1) by writing a 0 (or the drive password) to Register #48.
2. Control drive operation with various commands to Register #1 (Start, Stop, Forward, Reverse, etc.). To start
the drive, a value of 0x0008 should be sent to Register #1.
3. If the watchdog timer is enabled, keep it from timing out by assuring that a read command (to any register) is
performed within the time specified by P426.
4. Lock Control when drive operations are complete by writing a 0x0002 (i.e. setting the Lock Security bit) to
Register #1.
NOTE
If P100 = 3 (NETWORK ONLY) and the drive is still running when the Lock Security bit is set, it
will be brought to a stop by the method specified in Drive Programming Parameter P111 (STOP).
5. The drive will return to its normal control mode.
8.2 Changing Drive Parameters
The following is the sequence of events for changing drive parameters:
1. Unlock write access to the drive parameters by writing the drive password (P194) to Register #49. The drive
will remain in its normal control mode.
2. Write to all necessary drive configuration or parameters registers.
3. The watchdog timer is not enabled when only the parameters have been unlocked so there is no need to send
repeated read commands to prevent it from timing out.
4. Lock Control when drive operations are complete by writing a 0x0002 (i.e. setting the Lock Security bit) to
Register #1.
8.3 Controlling Frequency, PID & Torque Setpoints
The following is the sequence of events for changing the drive frequency, PID or torque setpoint:
1. Configure the setpoint reference for NETWORK. The network can be set as the frequency, PID or torque setpoint
reference in any of the following ways:
a) Set P101 (Standard Reference Source) to NETWORK (06) and make sure that no AUTO source has been
selected.
b) Set P121…P123 to AUTO: NETWORK (07) and assert the corresponding TB-13x terminal.
c) Unlock drive controls and write a value of 0xC000 to Register #1 (see Section 9.2.1).
2. Unlock parameters by writing the drive password (P194) to Register #49. The drive will remain in its normal
control mode. The watchdog timer is not enabled when only parameters have been unlocked so there is no
need to send repeated read commands to prevent it from timing out.
3. Modify the appropriate NETWORK setpoint register.
Register #44 - Network Speed Command
Register #45 - Network PID Setpoint Command
Register #46 - Network Torque Command
4. Lock Control when drive operations are complete by writing a 0x0002 (i.e. setting the Lock Security bit) to
Register #1.