6435-001-N-N servo drive system

Description

6435-001-N-N servo drive system

6435-001-N-N servo drive system

In this chapter

This chapter explains how to power up the 6430 drive after installation. Topics covered are:

• Setting up functions using switch S1 and Jumper J6

• AC Switch (SW1) Settings

• Testing the installation

This section is intended to familiarize the 6435-001-N-N user with the hardware adjustments and settings required to power up and operate the 6435-001-N-N drive.

Mid-speed instability and the resulting loss of torque occurs in any step motor/drive system due to the motor back EMF modulating the motor winding currents at certain speeds. Mid-speed instability can be explained as a region of potential instability that occurs as a result of the electronic, magnetic, and mechanical characteristics of any stepping motor system. The circuitry used to control this phenomenon does so by advancing or delaying the switching of the output current with respect to the incoming pulse train. This should be taken into account if the user is attempting to employ pulse placement techniques.

Enable the digital electronic damping function by placing DIP switch S1 position 4 in the open position as shown. This is the default position and should be used for most applications if your application is affected by loss of torque at mid-range speeds. If pulse placement techniques are being used, disable the digital electronic damping function by placing DIP switch S1 position 4 in the open position.

The essence of the FCS system is the fieldization of information processing. For a control system, whether using DCS or fieldbus, the amount of information that the system needs to process is at least the same. In fact, with the use of fieldbus, more information can be obtained from the field. The amount of information in the fieldbus system has not decreased or even increased, while the cables used to transmit information have greatly decreased. This requires greatly improving the ability of cables to transmit information on the one hand, and allowing a large amount of information to be processed on-site to reduce information round-trip between the site and the control room on the other hand. It can be said that the essence of fieldbus is the fieldization of information processing. Reducing information round-trip is an important principle in network design and system configuration. Reducing information round-trip often brings the benefit of improving system response time.

Therefore, in network design, priority should be given to placing nodes with high exchange of information between each other in the same branch. Reducing information round-trip and reducing system cables can sometimes contradict each other. At this point, we should still make choices based on the principle of saving investment. If the response time of the selected system allows, a cable saving solution should be chosen. If the response time of the selected system is relatively tight, a slight reduction in information transmission is sufficient, then a plan to reduce information transmission should be chosen.

Nowadays, some field instruments with fieldbus are equipped with many functional blocks themselves. Although different products may have slight differences in the performance of the same functional block, it is objective to have many identical functional blocks on a network branch. Which function block to choose from on site instruments is a problem that the system configuration needs to solve. The principle to consider this issue is to minimize the round-trip of information on the bus as much as possible. It is generally possible to select the function block on the instrument panel that outputs the most information related to this function.

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