Troubleshooting
Ethernet Communication Troubleshooting
This section is used to troubleshoot the communication between two devices linked via Ethernet.
TIP: For communication troubleshooting, it is strongly advised to create a new Graco Gateway database including only one data tag mapped to a known register in the target device.
PROBLEM | CAUSE | SOLUTION |
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Values show | Incorrect target device IP address. | Check the target device IP address in |
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| Graco Gateway (in communications |
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| on the PLC symbol) to match the tar- |
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| get device IP address setup. |
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| Incorrect cable or wrong connection. | Check the LED on the Graco Gate- |
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| way device Ethernet port. If none are |
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| lit, there are no connections. Check |
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| the cable or that the Ethernet port is |
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| enabled in Graco Gateway, see |
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| below. |
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| Ethernet port disabled. | Check that the Ethernet port in Graco |
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| Gateway is enabled. |
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| Graco Gateway and target devices |
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| are in a different address domain: |
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| • If no routers are present on the | Check that the target device IP |
| network. | address and Graco Gateway device |
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| IP address are different but in the |
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| same domain. (For example, both |
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| start with the same three first num- |
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| bers; ex: 192.168.2.xxx if the mask is |
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| 255.255.255.0). |
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| • If a router is present on the net- | Check the Graco Gateway device |
| work. | Ethernet port Gateway address to |
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| match the router IP address. |
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| Incorrect tag mapping. | Check that the tag is mapped to an |
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| existing register in the target device. |
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Values blink between the data and | Incorrect tag mapping on one of the | Delete tags one after another and |
tags on the display. | download | |
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| ues on the screen stop blinking, the |
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| last deleted tag was mapped incor- |
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| rectly or accessed an unknown regis- |
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| ter in the target device. |
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| Communications | Increase the Slave Response or |
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| Device Timeout on the communica- |
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| tion port or target device in Graco |
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| Gateway. |
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312785C | 37 |