pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)
Command: Operator level |
| Modbus address: 4288 | Length: 4 | Type: 3 | Read | ||
Parameter: | Operator level |
| Password |
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Format: | Hex | decimal |
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Value: | 0x30 | 0 |
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Figure 2.2.1.4: Example to read the active operator level: the active level is 0x30 (Specialist). The sensor does not report the password. The value 0 is returned instead.
Command: Operator level |
| Modbus address: 4288 | Length: 4 | Type: 16 | Write | ||
Parameter: | Operator level |
| Password |
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Format: | Hex | decimal |
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Value: | 0x03 | 0 |
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Figure 2.2.1.5: | Example to set the operator level to 0x03 (User). The password 0 has to be sent. |
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Command: Operator level |
| Modbus address: 4288 | Length: 4 | Type: 16 | Write | ||
Parameter: | Operator level |
| Password |
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Format: | Hex | decimal |
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Value: | 0x0C | 18111978 |
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Figure 2.2.1.6: Example to set the active operator level to 0xC (Administrator). The correct password has to be sent.
Command: Operator level | Modbus address: 4288 | Length: 4 | Type: 16 | Write | ||
Parameter: | Operator level | Password |
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Format: | Hex | decimal |
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Value: | 0x0B | 18111978 |
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Figure 2.2.1.7: Example for a Modbus error. If the level or the password is not correct, (Operator level = 0x0B), the sensor answers with a Modbus error message “Slave device exception response” (see chapter 1.6).
2.2.2 Changing Passwords for Operator Level
The passwords for accessing the operator levels A and S can be modified by S (Specialist) only. U (User) and A (Administrator) have no right to change any password. The new password will remain stored after power down.
Start |
| Number of | Reg1 / Reg2 | Reg3 / Reg4 | Modbus |
| Read | Write |
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register |
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| function code |
| access | access |
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4292 |
| 4 |
| Level |
| New password | 16 |
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| None | S |
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Figure 2.2.2.1: Definition of register 4292. |
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Command: Password |
| Modbus address: 4292 | Length: 4 |
| Type: 16 | Write |
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Parameter: |
| Operator level | Pass number |
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Format: |
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| Decimal |
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Value: |
| 0x30 |
| 12345678 |
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Figure 2.2.2.2: Example to set the Password of operator level S (code 0x30) to 12345678.
624300/01 | page 6 / 67 |
