Sample Packet With Crc-16; Memory Map - GE 269Plus Instruction Manual

4 COMMUNICATIONS
c) SAMPLE PACKET WITH CRC-16
The following is a sample packet to read 102 bytes of actual values information from Slave number 64, starting
at address 00h. The CRC-16 code is accurate and this packet may be used for testing purposes.
ADDRESS
FUNCTION
START REG (HI)
START REG (LO)
REG. COUNT (HI) = 00 hex
REG. COUNT (LO) = 33 hex
CRC (LO)
CRC (HI)
The 269Plus memory map is broken up into two areas: the Actual Values address space and the Setpoints
address space. Each space has a total of 256 bytes. There are separate commands used to access the two
different spaces. The memory map is Table 4–2: 269PLUS MEMORY MAP on page 4–10. The data formats
are in Table 4–3: MEMORY MAP FORMAT CODES on page 4–24.
Since some Master PLCs only support command 03, the Actual Values registers may be accessed using a set-
point read command (03) beginning at offset 0200H (or 512 decimal). Therefore, accessing these registers
using a setpoint read command may be accomplished simply by adding 0200H (or 512 decimal) to the Actual
Values register in question.
GE Power Management
Courtesy of NationalSwitchgear.com
= 40 hex
= 04 hex
= 00 hex
= 00 hex
= BF hex
= 0E hex
269Plus Motor Management Relay

MEMORY MAP

4.9 MEMORY MAP
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