自动化改变世界

新手常见问题Modbus 网络上只能有一个主站存在吗?

Modbus 网络上只能有一个主站存在。Modbus 是一种单主站的主/从通信模式。Modbus 网络上只能有一个主站存在,主站在 Modbus 网络上没有地址,从站的地址范围为 0 – 247,其中 0 为广播地址,从站的实际地址范围为 1 – 247。
主站的简单理解就是主动去访问从站,从站只能被动相应主站的请求。

A Gallery Post

Then, as the midday sun withdraws from the gulf the shadow of the mountains, the clouds begin to roll out of the lower valleys. They swathe in sombre tatters the naked crags of precipices above the wooded slopes, hide the peaks, smoke in stormy trails across the snows of Higuerota. The Cordillera is gone from you as if it had dissolved itself into great piles of grey and black vapours that travel out slowly to seaward and vanish into thin air all along the front before the blazing heat of the day. The wasting edge of the cloud-bank always strives for, but seldom wins, the middle of the gulf. The sun—as the sailors say—is eating it up.

Indeed, these cloudy nights are proverbial with the seamen along the whole west coast of a great continent.

Unless perchance a sombre thunder-head breaks away from the main body to career all over the gulf till it escapes into the offing beyond Azuera, where it bursts suddenly into flame and crashes like a sinster pirate-ship of the air, hove-to above the horizon, engaging the sea.

Continue reading

Spring is in the air

Dorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.

Continue reading

We’ve moved to a new office

Dorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.

Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.

Continue reading

Reason I love traveling

Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at

Vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.

Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum.

Continue reading

顶部文字

自动化改变世界