How to do Explicit Messaging by Anybus CompactCom M40 EIP?

Anybus Support
#1

Hi Tech Support,

I have done I/O Messaging by using Assembly Object (04h) / Instance 64h to get Adi1 and Instance 96h to set Adi64, see Adi map below copied from appl_adimap_separate16.c:

const AD_AdiEntryType APPL_asAdiEntryList[] = {
{ 1, “ABP_UINT16_GET”, ABP_UINT16, REG_NUM, APPL_WRITE_MAP_READ_ACCESS_DESC,
{
{ appl_aiUint16_1, NULL}
}, GetAdi1Value, NULL},
{ 64, “ABP_UINT16_SET”, ABP_UINT16, 8 , APPL_READ_MAP_WRITE_ACCESS_DESC,
{
{ appl_aiUint16_64, NULL}
}, NULL, SetAdi64Value},
};

Now I am trying to use Explicit Messaging to transfer data with ADIs. What object do I need to implement for the above ADIs? Or do I need to create separate ADIs for Explicit Messaging?

#2

Hello David,

Is the compactcom unit on a developed product? Or is this being actively developed?

#4

Hi Kevin,

Thanks for you quick response!

It is a my actively developed board. It had been tested with M40 EIP, M40 TCP and M40 ProfiBus.

#5

Hi Kevin,

I have not heard any feed back from you about a week. Can you help me for the questions asap? I would appreciate your answers in advance.

#6

Hi Tech Support,

If I can’t get help on my design, I need to decide what else I could do. Maybe I have to stop using Anybus products because that.

#7

Hello,

I apologize for the delays. I recieved a call and I though I talked to you earlier this week. I apoloize for this issue.

I checked our documentation and spoke to our developers. The gateways do not utilize explicit messaging, it will not transfer through the gateway.

#8

Kevin,

Thank you for the answer. Implicit message should be good for mine.

#9

Hi David,

I should be able to help you out further with this issue I think Kevin was mixing this up with one of our gateways.

To access data via explicit message it has to be defined with read/write permissions. This would be done with the ADI object A2h see Page 100

When you create an ADI you can indicate if the ADI is mapped/assignable to processdata and also if the ADI has explicit read and/or write access. In your example it looks like you have Write configured for one and Read configured for another.

#define APPL_WRITE_MAP_READ_ACCESS_DESC ( ABP_APPD_DESCR_GET_ACCESS |
ABP_APPD_DESCR_MAPPABLE_WRITE_PD )

#define APPL_READ_MAP_WRITE_ACCESS_DESC ( ABP_APPD_DESCR_GET_ACCESS |
ABP_APPD_DESCR_SET_ACCESS |
ABP_APPD_DESCR_MAPPABLE_READ_PD )

Looking at the example you posted you should be able to explicitly request object 0xA2, instance 1 and instance 42. with attribute 5 holding the value.

Alternatively you look into the CIP Parameter Object. This has some limitations and I recommend looking at page 87 in the design guide. https://cdn.hms-networks.com/docs/librariesprovider7/default-document-library/manuals-design-guides/hms-scm-1202-031.pdf?sfvrsn=435fadd6_55

Deryck