I agree that you're going to want to look at the actual I/O image while observing the indicators on the modules themselves to help verify that your assumptions are correct.
The paired 32-point modules are typical of '1-slot' addressing.
'1-slot' addressing means that each physical slot is allocated one logical 'Group', which has 16 bits of Input data and 16 bits of Output data.
Putting a 32-bit Input module into Rack 01, Group 0 means that it will use up Word 0 and Word 1 of the Input data table. That makes Word 1 of the Input data table unavailable to a module located in the adjacent slot.
But that's OK; the next slot is occupied by a 32-bit Output module, which will use Word 0 and Word 1 of the Output data table.
Check the BTR and BTW instructions for the analog modules in Rack 0, and you'll probably find the ones for the Analog Output module are addressed to 'Group 5, Slot 0'.
The labels on this chassis, of course, also bolster the conclusion that it's set up for 1-Slot addressing.
Other chassis out along the RIO chain might be set up differently.
Stock up on graph paper, practice counting in Octal, and good luck !
The paired 32-point modules are typical of '1-slot' addressing.
'1-slot' addressing means that each physical slot is allocated one logical 'Group', which has 16 bits of Input data and 16 bits of Output data.
Putting a 32-bit Input module into Rack 01, Group 0 means that it will use up Word 0 and Word 1 of the Input data table. That makes Word 1 of the Input data table unavailable to a module located in the adjacent slot.
But that's OK; the next slot is occupied by a 32-bit Output module, which will use Word 0 and Word 1 of the Output data table.
Check the BTR and BTW instructions for the analog modules in Rack 0, and you'll probably find the ones for the Analog Output module are addressed to 'Group 5, Slot 0'.
The labels on this chassis, of course, also bolster the conclusion that it's set up for 1-Slot addressing.
Other chassis out along the RIO chain might be set up differently.
Stock up on graph paper, practice counting in Octal, and good luck !
Plc Slot Numbering
PLC-5 processors when you use 2-slot, 1-slot, or 1/2-slot addressing. This information is in addition to your PLC-5 user documentation. You should already have a solid understanding of how to use your PLC-5 processor. 32-point I/O modules with 1-slot addressing or with a chassis that.
June 28th, 2002, 12:19 AM
Plc 5 1 Slot Addressing Software
Plc 5 Io Addressing
5 1 Height Cm
Hi PLC guys,
I have a PLC Allen Bradley with type PLC5/20, complete with analog (1771-IFE/C, 1771-OFE)and digital modules.
Using RSLogix5 software, I have try to upload data from PLC5.
When the software RSLogix5 going to offline mode (PLC5 still running),on the I/O configuration we don't find list the I/O that has installed on the chassis PLC5/20.
The problem is, I don't know how to defined or read addresing each channel on the analog modules (1771-IFE/C, 1771-OFE), since analog module doesn't use addressing mode (1 slot, 1/2, 2slot,).This addressing only for digital modules.(different with SLC500, when upload program use RSLogix500, we can get list of all I/O Configuration even digital or analog modules).
Does anybody has experience it?
I have a PLC Allen Bradley with type PLC5/20, complete with analog (1771-IFE/C, 1771-OFE)and digital modules.
Using RSLogix5 software, I have try to upload data from PLC5.
When the software RSLogix5 going to offline mode (PLC5 still running),on the I/O configuration we don't find list the I/O that has installed on the chassis PLC5/20.
The problem is, I don't know how to defined or read addresing each channel on the analog modules (1771-IFE/C, 1771-OFE), since analog module doesn't use addressing mode (1 slot, 1/2, 2slot,).This addressing only for digital modules.(different with SLC500, when upload program use RSLogix500, we can get list of all I/O Configuration even digital or analog modules).
Does anybody has experience it?