CC-Link IE Field Basic Modules

The CC-Link IE Field Basic implementation on DataMan consists of four I/O modules:

1. Control Block

2. Status Block

3. Output Data Block

4. Input Data Block

Signal Layout

Block name	Link Device Name	Data Length	Data Flow
Control Block	RY	64 bits (only the first 32 bits are used)	PLC to Reader
Status Block	RX	64 bits (only the first 32 bits are used)	Reader to PLC
Output Data Block	RWw	32 Words (64 bytes)	PLC to Reader
Input Data Block	RWr	32 Words (64 bytes)	Reader to PLC

Control Block (RY)

The Control block contains bit type data. However, the block may be defined to exist in either bit or word memory in the PLC. This block consists of the control signals sent from the PLC to the reader. It is used by the PLC to initiate actions and acknowledge certain data transfers.Control Block

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
Reserved				Results Ack	Buffer Results Enable	Trigger	Trigger Enable
Bit 15	Bit 14	Bit 13	Bit 12	Bit 11	Bit 10	Bit 9	Bit 8
Reserved
Bit 23	Bit 22	Bit 21	Bit 20	Bit 19	Bit 18	Bit 17	Bit 16
Reserved						Reserved	Reserved
Bit 31	Bit 30	Bit 29	Bit 28	Bit 27	Bit 26	Bit 25	Bit 24
Soft Event 7	Soft Event 6	Soft Event 5	Soft Event 4	Soft Event 3	Soft Event 2	Soft Event 1	Soft Event 0

Control Block (RY) Field Descriptions

Bit	Name	Description
0	Trigger Enable	This field is set to enable triggering via the Trigger bit. Clear this field to disable the network triggering mechanism.
1	Trigger	Setting this bit triggers an acquisition. Note: The Trigger Ready bit must be set high before triggering an acquisition.
2	Buffer Results Enable	When this bit is set, each read result set (ResultID, ResultCode, ResultLength and ResultData fields) will be held in the Output Block until it is acknowledged. Once acknowledged, the next set of read results will be made available from the buffer. If new read results arrive before the earlier set is acknowledged the new set will be queued in the reader’s buffer. The reader can buffer up to 50 and the base station can buffer up to 500 sets of read results. See Operation for a description of the acknowledgement handshake sequence.
3	ResultsAck	Set by the PLC to acknowledge that it has received the latest results (ResultID, ResultCode, ResultLength and ResultData fields). When the reader sees this bit transition from 0->1 it clears the ResultsAvailable bit. This forms a logical handshake between the PLC and reader. If result buffering is enabled, the acknowledgement will cause the next set of queued results to be moved from the buffer. See Operation for a description of the acknowledgement handshake sequence.
4-15	Reserved	Future use
16	Reserved	Future use
17	Reserved	Future use
18-23	Reserved	Future use
24-31	SoftEvents	Bits act as virtual discrete inputs. When a bit transitions from 0->1 the associated action is executed. After executing the action the reader sets the corresponding SoftEventAck to signal that the action is complete. This forms a logical handshake between the PLC and reader. Bit0: Train code Bit1: Train match string Bit2: Train focus Bit3: Train brightness Bit4: Un-Train Bit5: Reserved (future use) Bit6: Execute DMCC command Bit7: Set match string

Status Block (RX)

The status block contains bit type data. However, the block may be defined to exist in either bit or word memory in the PLC. This block consists of the status signals sent from the reader to the PLC. It is used by the reader to signal status and handshake certain data transfers.

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
Reserved				Missed Acq	Acquiring	Trigger Ack	Trigger Ready
Bit 15	Bit 14	Bit 13	Bit 12	Bit 11	Bit 10	Bit 9	Bit 8
Genereal Fault	Reserved			Results Available	Results Buffer Overrun	Decode Complete Toggle	Decoding
Bit 23	Bit 22	Bit 21	Bit 20	Bit 19	Bit 18	Bit 17	Bit 16
Reserved						Reserved	Reserved
Bit 31	Bit 30	Bit 29	Bit 28	Bit 27	Bit 26	Bit 25	Bit 24
Soft Event Ack 7	Soft Event Ack 6	Soft Event Ack 5	Soft Event Ack 4	Soft Event Ack3	Soft Event Ack 2	Soft Event Ack 1	Soft Event Ack 0

Status Block (RX) Field Descriptions

Bit	Name	Description
0	Trigger Ready	Indicates when the reader is ready to accept a new Trigger. The reader sets this bit when TriggerEnable has been set and the reader is ready to accept a new trigger.
1	Trigger Ack	Indicates when the reader recognizes that Trigger has been set. This bit will remain set until the Trigger bit has been cleared.
2	Acquiring	Set to indicate that the reader is in the process of acquiring an image. Note: For CF26, this bit is “Reserved”.
3	Missed Acq	Indicates that the reader missed a requested acquisition trigger. The bit is cleared when the next acquisition is issued.
4-7	Reserved	Future use
8	Decoding	Deprecated. The value of the Decoding bit is always the same as the Acquiring bit.
9	Decode Complete Toggle	Indicates new result data is available. Bit toggles state (0->1 or 1->0) each time new result data becomes available.
10	Results Buffer Overrun	Set to indicate that the reader has discarded a set of read results because the PLC has not acknowledged the earlier results. Cleared when the next set of result data is successfully queued in the buffer. This bit only has meaning if result buffering is enabled.
11	Results Available	Set to indicate that new result data is available. Bit will remain set until acknowledged with ResultsAck even if additional new read results become available.
12-14	Reserved	Future use
15	General Fault	Set to indicate that an Ethernet communications fault has occurred. Currently only used by soft event operations. Bit will remain set until the next successful soft event or until TriggerEnable is set low and then high again.
16	Reserved	Future use.
17	Reserved	Future use
18-23	Reserved	Future use
24-31	SoftEvent Ack	Set to indicate that the reader has completed the soft event action. Bit will remain set until the corresponding SoftEvent bit is cleared. This forms a logical handshake between the PLC and reader. Bit0: Ack train code Bit1: Ack train match string Bit2: Ack train focus Bit3: Ack train brightness Bit4: Ack untrain Bit5: Reserved (future use) Bit6: Ack Execute DMCC command Bit7: Ack set match string

Input Data Block (RWw)

The Input Data block contains word type data. This is data sent from the PLC to the reader. The block consists of user defined data that may be used as input to the acquisition/decode operation.

Word 0	Word 1	Word 2..N
UserDataOption	User Data Length	User Data

Input Data Block (RWw) Field Descriptions

Word	Name	Description
0	User Data Option	Optional user data information. Currently only used by “Set Match String” SoftEvent. Specifies which code target to assign the string (16-bit Integer). Bit0: Assign string to all targets Bit1: Assign string to 2D codes Bit2: Assign string to QR codes Bit3: Assign string to 1D/stacked/postal codes
1	User Data  Length	Number of bytes of valid data actually contained in the UserData field.
2..N	User Data	User defined data that may be used as an input to the acquisition/decode.

Output Data Block (RWr)

The Output Data block contains word type data. This is data sent from the reader to the PLC. The block consists primarily of read result data.

Word 0	Word 1	Word 2	Word 3	Word 4	Word 5..N
Reserved	Trigger ID	Result ID	Result Code	Result Length	Result Data

Output Data Block (RWr) Field Descriptions

Word	Name	Description
0	Reserved	Future use
1	Trigger ID	Trigger identifier. Identifier of the next trigger to be issued. Used to match issued triggers with result data that is received later. This same value will be returned as the ResultID of the corresponding read.
2	Result ID	Result set identifier. This is the value of TriggerID when the corresponding trigger was issued. Used to match up triggers with corresponding result data.
3	Result Code	Indicates the success or failure of the read that produced this result set. Bit0: 1=Read, 0=No read Bit1: 1=Validated, 0=Not Validated Bit2: 1=Verified, 0=Not Verified Bit3: 1=Acquisition trigger overrun Bit4: 1=Acquisition buffer overrun Bit5: Reserved Bit 6: 1=result is a DMCC response, 0=result is a read result. For more information, see DMCC Result Feedback from PLC. Bit7-15: Reserved (future use)
4	Result Data Length	Number of bytes of valid data actually in the ResultData field.
5..N	Result Data	Result data from this acquisition/decode.