A-B 1756-DMD30 Module Rockwell 1-Axis Control Unit

General

The power converter modules DCS800-S have the protection class IP00 and are to be mounted in a cubicle or finger protected area. 

There are different sizes (D1. D2. D3. D4. D5. D6. D7), graduated in terms of current and voltage ranges.

All units are equipped with the DCS800 Control Panel. 

It can be snapped into place on the power converter module or installed in the switchgear cubicle door by means of amounting kit. 

Accessories such as external fuses, line reactors etc. are also available, to complete the drive system. 

All converter modules up to 525 V and 1000 A (D1...D4) are equipped with field exciters.

The power section of the converters is available as single  (2-Q) bridge or double (4-Q) bridge. 4-Q drives are required for regenerative breaking. 

4-Q drives can be built by:

–Double (4-Q) armature bridge or –Single (2-Q) armature bridge plus a double (4-Q) field converter bridge

The bridge type has an influence on the maximum output voltage of the converter. See table below.

Restrictions

• Volts per Hertz operation requires the use of the Custom User Defined Controller Communication Format.

If another Controller Communication Format is selected (e.g. Velocity Control, 

Position Control or User Defined Control) and the drive is configured for Volts per Hertz operation, 

the Drive Module will not connect to the controller.

• This module sometimes experiences PMI Comm faults during power cycles.

For example, when the Drive Module and PMI processor are power-cycled the drive module initializes its interface

with the PMI processor. During the transition from initialization to synchronized communication,

the Drive Module sometimes experiences communication faults and warnings. 

These faults and warnings can be cleared with a clear faults command. 

You may have to perform a reset after power-up, or perform multiple resets.

Local DH+ Messaging Devices use local DH+ messaging to communicate between devices on the same physical link.

A device that uses local DH+ messaging must: 

• generate local DH+ packets. 

• support local DH+ protocol. 

• send and receive messages. 

A local DH+ message sent on a DH+ network has only enough address information to get the message 

to a target node on the same DH+ network. 

The example in the following figure shows a PLC-5 controller sending a message to port A on the 1756-DHRIO and 1756-DHRIOXT modules. 

Because the controller slot for port A is configured to “0”, the message is forwarded to the ControlLogix controller in slot 0.

Receiving Local DH+ Messages on DH+ Because a local DH+ message 

has only enough address information to get the message to a target node on the same DH+ network, 

the 1756-DHRIO and 1756-DHRIOXT modules that receive this message cannot identify where to send the message. 

The 1756-DHRIO and 1756-DHRIOXT modules use the Controller Slot configuration parameter to send the message to the local controller. 

You must use RSLinx software to configure the controller slot. 

ATTENTION: 

Energized industrial control equipment can be hazardous. 

Severe injury or death can result from electrical shock, burn, or unintended actuation of controlled equipment. 

Hazardous voltages may exist in the cabinet even with the circuit breaker in the off position. 

Recommended practice is to disconnect and lock out control equipment from power sources, 

and discharge stored energy in capacitors, if present. 

If it is necessary to work in the vicinity of energized equipment, the Safety Related Practices of NFPA 70E,

“ELECTRICAL SAFETY FOR EMPLOYEE WORKPLACES” must be followed. 

DO NOT work alone on energized equipment!