Omron CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1, C200HW-CLK21 RECV98 Instruction, Maximum Delay Time

Message Delay Times			Section 8-4
	Example
	In this example, the maximum transmission delay is calculated for an instruc-
	tion sending 256 words of data in a system with 32 nodes. Network specifics
	are detailed below:
	Baud rate:	2 Mbps
	Max. node number:	32
	Number of nodes:	32
	Number of polled nodes: 4
	Number of words:	256
	Data link:	halted
	Link Unit servicing (source node)		PLC cycle time (source node)
	Transmission processing		0.00125 ⋅ 256 + 3 = 3.32 ≅	3.3 ms
	Communications cycle time (See note.)		600 ⋅ 4 + 110 ⋅ 32 + 320 ⋅	0 + 4 ⋅
			0 + 2,290 = 8,210 ∝s ≅ 8.2 ms
	Transmission delay (command)		0.008 ⋅ 256 + 0.112 = 2.16 ≅
			2.2 ms
	Reception processing		0.00125 ⋅ 256 + 2.3 = 2.62 ≅
			2.6 ms
	Link servicing interval (destination node)		PLC cycle time (destination node)
	Total (max. transmission delay)		PLC cycle time (source node) ⋅
			2 + PLC cycle time (destination
			node) + Peripheral servicing
			time (destination node) +
			16.3 ms
Note
	This communications cycle time is calculated assuming that there is no node
	that transmits event frames before the SEND command is issued.
RECV(98) Instruction	The following indicates the data flow which will yield the maximum transfer
Maximum Delay Time	interval from the time the RECV(98) instruction is executed by the user pro-
	gram to the time the Controller Link Unit stores the data in the local Unit’s
	memory area.
Note	Be sure to take into account the time required for data links and program exe-
	cution, which are not included in the following example.

RECV(98) executed		Data stored
	Max. transmission delay
			Link Unit servicing
			(source node)

Transmission processing (command)

Reception processing (response)

Transmission delay

Communications cycle

Transmission delay

Reception processing (command)

Transmission processing (response)

Link Unit servicing (destination node)

Max. transmission delay = Link Unit servicing interval (source node) + Trans- mission processing (command) + Communications cycle + Transmission delay (command) + Reception processing (command) + Link Unit servicing

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