ABB FPBA-01 PROFIBUS DP - Call-REQ-PDU Telegram for ReadWrite Access to I&M Records

192 Appendix B – I&M records
 Call-REQ-PDU telegram for read/write access to
I&M records
Contents Size Coding Notes
DP-V1
header
Function_Num 1 Octet 5Fh fixed
Slot_Number 1 Octet 0…255 variable
Index 1 Octet 255 fixed
Length 1 Octet 4 / 68 Call Header only /
Write
Call
Header
Extended_Function_
Num
1 Octet 08h Indicates “Call”,
fixed
reserved 1 Octet 00h fixed
FI_Index 2 Octets 65000… Subindex of I&M0
Record
65000 = I&M0
65001 = I&M1
65002 = I&M2
IM_Function 64 Octets Data Write only (I&M1
or I&M2)