232 to 485 with SLC500

Hi all

I am going to change out a SLC500 5/03 processor to a 5/04 type as the 5/04 is the one we stock and have elsewhere on the plant.

The 5/03 has a RJ45 DH485 connection to a HMI.

If I set up the RS232 channel on the new 5/04 to be DH485 and install a RS232 to 485 convertor (likely to be an Adam unit) is that simply all I have to do to get the HMI to talk to the SLC?

Also, to go from the Adam 232 to the 232 port on the SLC would my lead be a straight through serial cable using pins

2 - 2 (Transmit)
3 - 3 (Receive)
7 - 7 (Signal ground)

I think all of the above should work but I have to take the machine offline to make the changes so I would rather be a bit more sure!

Going from the Adam232 port to the SLC 232 port is a straight through connection.:nodi:

I think you just use a RS232 to DH485 converter will enable your SLC to communicate with the HMI.

regards
Sherine T.

When you configure the port for DH485 then you do not need any additional converters such as the adams which would not work anyway as DH485 is not the 485 standard. Regards Alan Case

A search of Rockwell knowledge base reveals to connect a PanelView to channel 0 [232] of a SLC 5/04 I would use a cable with pin layout

2-2
3-3
5-5

I have never made up a RJ45 to 9 pin D. Do you follow the same convention of using pins 2, 3 & 5 on the RJ45 to pins 2, 3 & 5 on the D shell. Will this straight connection work? I was under the impression that the channel 0 port on the SLC was only for 232?

I think the using the term RS232 is confusing everyone. The SLC 5/04 has a 9-pin connector that looks like a serial port. However, it can only be configured for DF1 or DH485 (system) or ASCII (user).

Okey dokey!

If its a DH485 only connection on channel 0 then I dont need a convertor. Excellent

Would anyone else like to comment on the pin layout.

If I use

RJ45 9 pin D
2 - 2
3 - 3
5 - 5
does provide power to the unit. I dont understand the layout for DH485 or RS485. I know its different but for a 232 connection I would pins 2, 3 & 7 as 7 is signal ground. How do I find out the required pin layout? I think I will make a seperate post.

The Ch0 9 pin serial connection on the 5/04 is always electrically RS232. In the absence of an external port splitter it always connects point to point to another This is just a standard serial cable.

The protocol that runs on this link can be either DF1 Full Duplex, which supports point-to-point only, or DH-485 which supports 32 node peer to peer, or DF1 Half-Duplex which supports 256 node Master/Slave.

At the PanelView end you can choose from part numbers with xxxA5 have an RS232 port that runs DH485. The cable for this is specified as:

2 - 2
3 - 3
5 - 5

Alternatively a PanelView part number xxxA16 with the same RS232 port runs DF1. The cable for this is specified as:

2 - 2
3 - 3
4 - 4
5 - 5
6 - 6
7 - 7
8 - 8

Both of these PanelViews can be connected Point to Point into the Ch0 Serial port of the SLC5/04, if you then set the Ch0 port protocol to the matching PanelView protocol.

With Pass-Thru enabled you can now download to the PanelView via the Ch1 DH+ port without having to break into the Ch0 connection.

Having just re-read your thread I just figured that you probably have a PanelView with a part number ending in xxxA2. This type has a electrical RS-485/DH485 port, that is NOT electrically RS-232. It is a form of RS-485 that is full duplex, ie it has two RS485 connections, a transmit/receive duplex with 5 wires. This port will NOT point to point connect to your Ch0 port.

The simplest way around this is to use a 1761-NET-AIC+ to convert the electrical DH-485 PanelView port to RS 232. The parts needed are:

1761-CBL-AS03 or AS09 (300 or 900mm,) PanelView to AIC+

1761-NET-AIC+

1747-CP3 SLC5/04 to AIC+.

Note also it will be essential to power the AIC+ with its external +24v DC connections.

Ok Phillip thanks for the info.

Edit my post after your second post.

Ok here is the full story. I have a thrid party HMI (ESA) and goes into a AIC. Out of the AIC to a SLC 5/03. Im converting the 5/03 to a 5/04. 5/04 has 232 port, not the female RJ45 socket like on the 5/03. If I make a RJ45 straight through to 9 pin D to plug into the 5/04 will it work or can I fry the port (probably what Im most concerned about, I can use trial and error until I let the smoke out which = BAD, rathe know what Im doing first).