Hi Niclas,
when preparing a workshop for the Building IoT we were looking for something
where you could simulate a Modbus Slave.
Most of these were Windows only solutions, so ModbusPAL was one of the very few
solutions that were pure-java.
Don't quite understand what the thing with the offset is however ... should be
easy to fix ... I mean if I say address 42 in PLC4X, Wireshark says 42, but in
Modbus Pal I think it has to be 43 ... don't quite get it.
Chris
Am 15.07.20, 03:54 schrieb "Niclas Hedhman" <nic...@hedhman.org>:
What is ModbusPAL?
The 1-offset in Modbus has caused a lot of confusion over the years.
On Tue, Jul 14, 2020 at 11:03 PM Christofer Dutz <christofer.d...@c-ware.de>
wrote:
> Sorry for the noise ...
>
> this was a false positive ... the driver was doing things correctly.
> It seems the ModbusPAL was just off by one ;-)
>
> Chris
>
>
>
> Am 14.07.20, 15:51 schrieb "Christofer Dutz (Jira)" <j...@apache.org>:
>
> Christofer Dutz created PLC4X-214:
> -------------------------------------
>
> Summary: [Modbus] Holding register addresses have an
> offset of 1 (Not reading the correct address)
> Key: PLC4X-214
> URL: https://issues.apache.org/jira/browse/PLC4X-214
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-Modbus
> Affects Versions: 0.7.0
> Reporter: Christofer Dutz
> Assignee: Christofer Dutz
> Fix For: 0.8.0
>
>
> If I set holding the following holding registers to:
>
> 1000: 41
> 1001: 42
> 1002: 43
>
> And then read: holding-register:1001 ... I get the value 43 returned.
>
>
>
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