Confirming The Allocations - Toshiba V Series Manual

Chapter 4 Operating Procedures for the DN311 (Software)
4.4.2

Confirming the allocations

4
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(1) Function
Where in the input/output data areas of the DN311 the input/output data of a specified
slave device are allocated is calculated. Based on this allocation information, the
input/output data are read or written using an MREAD or MWRITE instruction.
(2) Diagrammatic representation (Function block)
Input Argument
REQ BOOL type Execution enabled
CH WORD type Channel No.
UNIT WORD type Unit No.
SLOT WORD type Slot No.
NODE WORD type Node address
(3) Description of the function
(a) When REQ is TRUE, the allocations (top address and number of words) in the
input/output data areas of the slave device specified in terms of node under
management by the DN311 that is specified by CH, UNIT, and SLOT are
calculated and output.
(b) If the processing is not completed in 2 seconds or more due to an error or the
like, ERR and DONE are turned TRUE.
(c) Completion status is output to STATUS.
(d) If REQ is FALSE, both DONE and ERR turn FALSE.
(e) Keep REQ TRUE till DONE becomes TRUE.
DN_INSTRUCT
REQ
DONE
CH
ERR
UNIT
STATUS
SLOT
BS_ADD
NODE
BS_N
RPOL_ADD
RPOL_N
WPOL_ADD
WPOL_N
Output Argument
DONE BOOL type
ERR BOOL type
STATUS WORD type Station status
BS_ADD WORD type BS input data top address
BS_N WORD type No. of BS input data words
RPOL_ WORD type P input data top address
ADD
RPOL_N WORD type No. of P input data words
WPOL_ WORD type P output data top address
ADD
WPOL_N WORD type No. of P output data words
P: Polling BS: Bit strobe
model 3000 DeviceNet Module Manual (DN311/DN311A)
Completed
Error