Specifications

Allen-Bradley DF1 Driver Help
1. Go to the Function File Options tab in the Device Properties dialog. Check the checkbox labeled Block
write supporting function files?. This notifies the driver to utilize block writes on function files
supporting block writes. The changes will be effective immediately after hitting the OK or Apply buttons.
2. Write the desired value to the sub element tag(s) in question. The sub element tag(s) will immediately
take on the value(s) written to it.
Note: After a sub element is written to at least once in block write mode, the tag's value does not originate
from the controller, but instead from the driver's write cache. After the block write is done, all sub
element tag values will originate from the controller.
3. Once the entire desired sub elements are written to, the block write that will send these values to the
controller may be performed. To instantiate a block write, reference tag address RTC:<element>._SET.
Setting this tag's value to "True" will cause a block write to occur based on the current (last read) sub
elements and the sub elements affected (written to). The _SET tag is treated as a Write Only tag;
meaning, a write to this tag is not reflected in subsequent reads on it. Setting this tag's value to "False"
performs no action.
SLC500 Slot Configuration
SLC500 models with modular I/O racks need to be configured for use with the Allen-Bradley DF1 driver if the I/O
is to be accessed by the driver. Up to 30 slots can be configured per device. To use the slot configuration dialog,
follow the instructions below.
1. Select the slot that will be configured by left-clicking on the row in the slot/module list box.
2. To select a module, left-click on it from the available modules list box.
3. Click Add to add the module.
4. To remove a module, select the slot in the slot/module list box and then click Remove.
Note: The module selections available are the same as those in the Allen Bradley APS software.
Users must know the number of input and output words in each slot. In order to address the I/O in a particular
slot, all slots up to and including that slot must be configured with I/O. For example, if a user is only interested in
the I/O in slot 3, the I/O for slots 1 and 2 must be configured.
See Also: SLC 500 Modular I/O Selection Guide
SLC 500 Modular I/O Selection Guide
The following table lists the number of input and output words available for each I/O module in the Slot
Configuration list.
Module Type Input Words Output Words
1746-I*8 Any 8 pt Discrete Input Module 1 0
1746-I*16 Any 16 pt Discrete Input Module 1 0
1746-I*32 Any 32 pt Discrete Input Module 2 0
1746-O*8 Any 8 pt Discrete Output Module 0 1
1746-O*16 Any 16 pt Discrete Output Module 0 1
1746-O*32 Any 32 pt Discrete Output Module 0 2
1746-IA4 4 Input 100/120 VAC 1 0
1746-IA8 8 Input 100/120 VAC 1 0
1746-IA16 16 Input 100/120 VAC 1 0
1746-IB8 8 Input (Sink) 24 VDC 1 0
1746-IB16 16 Input (Sink) 24 VDC 1 0
1746-IB32 32 Input (Sink) 24 VDC 2 0
1746-IG16 16 Input [TTL] (Source) 5VDC 1 0
1746-IM4 4 Input 200/240 VAC 1 0
1746-IM8 8 Input 200/240 VAC 1 0
1746-IM16 16 Input 200/240 VAC 1 0
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