GE SPM Series, Instruction Manual

Page: 102 / 126

9-
6
SPM Synchronous Motor Protection & Control GE Power Management
9.2 MEMORY MAPPING 9 MODBUS COMMUNICATIONS
9
DC SYSTEM 1140 DC CT PRIMARY 5 to 1000 1 A U16 5
1141 HIGH (EXCITER) FIELD
(max+1 = OFF) 0.20 to 450.00
or OFF
0.01,
0.10, 1.00
Ω
2decU16 0
1142 (EXCITER) FIELD AMPS
(zero = OFF) 0.1 to 1000.0
or OFF
0.1 if <10A
1.0 if
≥
10A
A 1decU16 0
1143 (EXCITER) FIELD VOLTS (zero = OFF) 1 to 200 or OFF 1 V U16 0
1144 (EXCITER) FIELD AMPS DELAY 0.3 to 5.0 0.1 s 1decS16 0.3
1145 (EXCITER) FIELD VOLTS DELAY 0.3 to 5.0 0.1 s 1decS16 0.3
1146 Reserved
↓ ↓ ↓ ↓ ↓ ↓ ↓
114F Reserved
PF
REGULATION 1150 PF REGULATION LEVEL (max+1 = OFF) –0.90 to 1.00 / OFF 0.01 - 2decS16 111
1151 REGULATOR GAIN 1 to 100 1 - U16 1
1152 STABILITY 1 to 60 1 - U16 1
1153 REGULATOR OUTPUT 0 to 10
4
1 V U16 1
1154 FLOOR VOLTS 0.0 to 10.0
4
0.1 V 1decU16 0
1155 Reserved
↓ ↓ ↓ ↓ ↓ ↓ ↓
115F Reserved
Table 9–2: MODBUS MEMORY MAP (Sheet 5 of 5)
GROUP ADDR
(hex)
DESCRIPTION RANGE STEP
VALUE
UNITS FORMAT
CODE
FACTORY
DEFAULT
* Range for collector-ring motors.
** Range for brushless motors.
1. The access password must be written correctly before any setpoints can be written via Modbus. The password is initially the same as the default password,
but the two passwords are stored separately, so the keyboard can not be used to change the communications password and vice-versa.
2. The allowable range of FLA is as follows: the minimum full load amps value is 2/5 times the CT ratio; the maximum is equal to the CT ratio.
3. The locked rotor current is range dependent on the FLA setpoint: the minimum is twice the full load amps and the maximum value is 12 times the FLA.
4. REGULATOR OUTPUT must be greater than or equal to FLOOR VOLTS, likewise FLOOR VOLTS must be less than or equal to REGULATOR OUTPUT.