|
|
 |
Refer to the following tips to ensure proper operation.
| Tip 1 - |
Power supply unit |
| |
Never ground the AS-Interface line. Never use an ordinary power supply. Be sure to use a dedicated AS-Interface power supply unit and connect the ground (GND) terminal of the power supply unit to the system ground. |
| Tip 2 - |
Network expansion |
| |
The AS-Interface cable length cannot exceed 100m when no repeaters or extenders are used. If you have to expand the network, be sure to observe the following precautions.
| Expansion with extenders: |
| - |
The maximum cable length between the master and the extender must not exceed 100m. |
| - |
Do not connect any slaves or AS-Interface power supply units between the master and the extender. |
| - |
Do not confuse the positive (+) and negative (-) cables. |
| Expansion with repeaters: |
| - |
Up to two repeaters and/or extenders can be connected in series. This increases the cable length to a maximum of 300m (i.e. 3 segments of up to 100 m each). |
| - |
An AS-Interface power supply unit must be installed at every repeater. |
| - |
Under normal conditions, an extender cannot be installed downstream from a repeater. |
|
| Tip 3 - |
Slave |
| |
Each slave address can be used only once. Usable addresses are 1 to 31 in the standard system, and 1A to 31A and 1B to 31B in the A/B system (Ver. 2.1).
| Note: |
Slaves containing the chip SAP 4.0 can be re-addressed up to 15 times. Thereafter they will retain the 15th address. |
|
| Tip 4 – |
External power |
| |
The following applies if slaves are to be supplied with external power:
| - |
Use a 24V DC PELV power supply and a black AS-i external power supply cable. |
|
| Tip 5 - |
Routing cables |
| |
Observe the following precautions when laying the AS-Interface cables.
| - |
Always use AS-Interface cable (yellow) for communications. The brown core is positive (+) and the blue core is negative (-). |
| - |
Even if communications via the AS-Interface cable offers a high degree of EMC immunity, the AS-i cable must be routed as far as possible from power cables, even in the control panels. |
| - |
Use dedicated cables for the AS-Interface line. AS-Interface cables must not be laid together with others in a bus cable. |
| - |
If individual cores are used alone (e.g., in control panels), always lay core pairs in parallel. In standard stranded wires, lay individual cores together or twist them. |
|
| Tip 6 - |
EMC measures |
| |
Connect surge suppressors to all inductive loads such as magnetic contactors, relays, valves, and brakes. If inverters are installed, always use network filters, output filters, and shielded motor cables. |
| Tip 7 - |
Sensor and actuator power supply |
| |
Sensors and actuator power must be supplied directly from the input or output terminals of the connected slave. The cables should be kept as short as possible and away from power cables. Namely, the slaves should be as close as possible to the sensors and actuators. |
| Tip 8 - |
Installing inverters |
| |
| - |
Be sure to follow the installation guidelines in the instruction manual. |
| - |
For the shield of the cables between the filter and the inverter or between the inverter and the motor, connect at both ends directly to the devices with a sufficient cross section (at least 4mm2). |
|
| Tip 9 - |
Expanding the system (Ver. 2.1) |
| |
The A/B slaves and new analog slaves can only be used with a master that is supported by Ver. 2.1. |
| Tip 10 - |
Status/Diagnosis |
| |
For quick diagnosis, the status bits and diagnosis bits are analyzed by the PLC. |
|
