Version: 2020-09-04
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TEL +49(40)22692910 - EMAIL generex@generex.de - WEB www.generex.de (This and all other product datasheets are available for download.)
2. Bei dem CS141 Professional verwendet einen multifultionalen Mini-DIN-Anschluss. Modbus over RS-232 ist daher lediglich
eine Anschlussoption, die ausgewählt werden kann:
Please note:
Depending on the scope of function, the CS141 will provide different menu entries.In addition to the device setup, the Modbus service
must be enabled:
Modbus function codes
The CS141 supports the following function codes:
01H - Read Coils
02H - Read Discrete Inputs
03H - Read Holding Registers
04H - Read Input Registers
05H - Write Single Coil
Please note a UPS must support this type of commands - the currently available function codes depend on the connected UPS. In
general, standard UPS systems provide the functions 03H and 04H. The CS141 is designed not to distinct between these two functions.
Furthermore, the CS141 supports a query speed up to 38400 baud to allow a flexible integration into existing IT environments.
Modbus error codes
Excepted broadcast messages, where the master device sends requests to the slave device, the master expects a clear and valid
response from the slave he queried. If the answer does not match with expected specifications, the packet will be discarded with a
corresponding error message.
There are several possible events that may occur when a slave answers to a master's request:
1. The slave responds accordingly with a data packet that is both, correct and valid.
The master will handle it accordingly.
2. The slave unit does not receive the request the master device sends.
This event occurs, for example, in case of a communication error. from the point of view of the master the request was not
answered. As a consequence, the master will assume an appropriate timeout incident.
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