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1. Ethernet 4-39
Network Communications
Write Bits to PLC Memory
int HKEtn_WritePlcBitMemory(int DeviceType,DWORD addr,int BitNo,int
OnFlag,char *lpAddr)
This function is retained until write completion is received from the V7 series. (It is reset on
receipt of write completion to the PLC memory.)
• Parameters
DeviceType Address of the device to be written (Refer to “Chapter 5 Connection
to PLCs.”)
addr Top memory address to be written
For YOKOGAWA or YASKAWA PLCs, specify a number “−1” for the
address (addr).
Example: D400 → 399 D25 → 24
BitNo Bit number to be accessed
Example 1: When accessing to D20-05 of MITSUBISHI PLC
DeviceType 0
addr 20
BitNo 5
Example 2: When accessing to M20 of MITSUBISHI PLC
20 ÷ 16 = 1 ... 4
DeviceType 6
addr 1
BitNo 4
OnFlag 0: OFF 1: ON
*lpAddr IP address shown as a string of characters separated by dots
Example: “192.168.XXX.XXX”
• Return values
Success TRUE
Failure FALSE
Error details Get using HKEtn_GetLastError ().