DL305 - DL330/340 CPUs Frequently Asked Questions
DL305 - DL330/340 CPUs Frequently Asked Questions
Product Selected: DL305 - DL330/340 CPUs
Category Selected: Communications
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| Question: Why can I successfully connect with DirectSOFT to a D3-330 with my DCU, but when I put my DCU on a D3-330P, I cannot connect? |
| Answer: To connect to a D3-330P, dipswitch 6, block 1 (PGM mode at power up) has to be ON. |
| FAQ ID: 102 |
| Question: Can I do Peer-to-Peer networking between two D3-340s? |
| Answer: No. The D3-340 only supports Master/Slave networking. There is a misprint in the 305 User Manual. That is, one the master can initiate communications. Peer-to-peer communications allows that every device can initiate communications. |
| FAQ ID: 105 |
| Question: I have a GE Series 1 RS-422 DCU. What do I need to communicate to my RS-232-C port on my computer? |
| Answer: A FA-UNICON and a D2-DSCBL will be needed. The UNICON will plug directly on the DCU converting RS-422 to RS-232. A converter supplied with the UNICON will convert the RS-232 side of the UNICON to a RJ-12 modular connector. The D2-DSCBL will plug into the converter allowing a connection to a DB9 connector on the PC. |
| FAQ ID: 110 |
| Question: Why won't the DDE server read from my D3-330? |
| Answer: The password in the PLC is not allowing access. |
| FAQ ID: 120 |
| Question: Where can I locate a Modbus cross-reference table for a D3-340 CPU? |
| Answer: Printed table Xref Document There is a Excel spreadsheet for calculating the Modbus-Koyo conversion address. Modbus Spreadsheet Use the "340 Modbus" sheet |
| FAQ ID: 127 |
| Question: Can the D3-DCM be a Modbus master? |
| Answer: No it can't. |
| FAQ ID: 700 |