3.13 Modbus Port Indicator Codes
If the BM detects a condition that prevents communication at its Modbus Plus or Modbus ports it shuts off all ports and displays an error code pattern at its four Modbus port indicators
Indicator layouts are shown in Figure 22
The error pattern produces two bit codes for two hexadecimal digits First the indicators show a steady pattern for one second indicating the upper digit Then they show a flashing pattern for one second with the lower digit The continuous and flashing patterns alternate repetitively Port is the most significant bit in each code
Indicators
Pattern
Hexadecimal Digit
4 ± 3 ± 2 ± 1 | Steady | Upper digit |
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4 ± 3 ± 2 ± 1 | Flashing | Lower digit |
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Hardware Error Codes: 11 ... 19 Hex
Code (Hexadecimal)
Meaning
11 | PROM checksum error |
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12 | RAM data test error |
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13 | RAM address test error |
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14 | Normal power down event |
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17 | Bad or unexpected interrupt |
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18 | EEPROM checksum error |
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19 | Modbus port loopback error |
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Modbus Driver Error Codes: 24 ... 2E Hex
| Code (Hexadecimal) | Meaning | |
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24 | Modbus transmit state error | ||
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25 | Modbus receive state error | ||
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26 | ASCII transmit communications state error | ||
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27 | Transmit underflow error | ||
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28 | RTU transmit communications state error | ||
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29 | ASCII receive communications state error | ||
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| 2A | RTU receive communications state error | |
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| 2B | Transmit communications state error | |
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| 2C | Receive communications state error | |
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54 Configuring the Modbus Models | 31007492 | ||
