GE F650 User Manual page 194

7.1 COMMUNICATIONS
Q7. How many different communication Ethernet sessions can be opened through the LAN port?
A7. ModBus TCP/IP:4 sockets
DNP TCP/IP:3 sessions (from version 1.72 on)
Q8. May I use the cooper 10/100 BaseTX connection included in the basic model with all protocols?
A8. Yes, it may be used with all protocols. In noisy substation environments and/or long distances, it is recommended to use
fiber optic options due to much better EMC performance and immunity. For fiber optic models, it is necessary to adjust an
internal jumper to use the copper port.
Q9. Remote I/O CAN bus. Does it support DeviceNet protocol?
A9. No it does not support DeviceNet.
Q10. Which functions are available in the relay web server?
A10. Currently, it includes several functions for viewing measures and retrieving information.
Q11. Q11 May I use URPC to program the relay?
A11. Only oscillography records may be viewed with URPC once downloaded to a file using the ENERVISTA 650 Setup software.
Q12. May I connect URs and F650s to the same Ethernet?
A12. Yes, either in cable as in fiber, or even mix them.
Q13. How do I connect with fiber 10-BASE-FL UR relays with 100-BASE-FX F650 relays?
A13. Take into account that an UR is never connected directly to a F650 (neither two UR nor two F650 with each other) but they
are always connected through a hub or switch. The hub or switch where the URs are connected must be 10-BASE-FL and
the hub or switch for the F650 must be 100-BASE-FX.
Q14. How do I connect with cable 10_BASE-T UR relays with 10/100-BASE-TX F650 relays?
A14. The answer to this question is as described before but also in this case there is an advantage added, because the hub 10-
BASE-TX port is able to understand a 10-BASE-T port. This means that a hub 10-BASE-T port may be connected to an UR
or a F650, and a hub 10/100-BASE-TX port may be connected either to an UR or F650.
Q15. What happens with fiber optic connectors compatibility, because the hub that I have has a different connector to the
one of the F650, although both are 100-BASE-FX?
A15. Just buy fiber cables with the appropriate male connectors. For the UR and F650 side we need the same connectors, ST
type, for the hub side, the correspondent ones. And in what concerns to the fiber type, it is used the same for 10 as for 100,
it is the 50/125 or 62.5/125 multimode, this last one allows longer distances.
Q16. What is the difference between a hub and a switch?
A16. In a repeater type hub (shared hub), one unit talks and the rest listen. If all the units are talking at the same time there may
be collisions in the messages, what may produce certain communication delays.
The switch (switched hub) has very powerful processors and a lot of memory and it is much more expensive than the hub.
It directs messages to the proper destination avoiding collisions and allowing a much more efficient communication.
Q17. Why do we have 10/100 compatibility for cable but not for fiber?
7-2 F650 DIGITAL BAY CONTROLLER
CHAPTER 7: FREQUENTLY ASKED QUESTIONS
GEK-113000-AF