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Device onlyprinterdevicesession scope
^JH

Early Warning Settings

^JH configures early Warning Settings. It applies to the printer session and subsequent formats and controls printer hardware or connectivity rather than label pixels.

ZPLr compatibility note

  • Recognized by the renderer but has no label-raster effect.

These are code examples only. This printer or session command does not produce a standalone label image.

Syntax
^JHa,b,c,d,e,f,g,h,i,j
a

Early warning media or supplies warning

Sets early warning media or supplies warning. It can be omitted when the documented default is suitable.

Default
D
Required
No
Documented valuesDE

a variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

a = E

Uses E for early warning media or supplies warning while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-a-1.zpl
^JHE,900,N,1,N,D,1,N,1000000,N

a = D

Uses D for early warning media or supplies warning while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-a-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,N
b

Labels per roll

Sets labels per roll. It can be omitted when the documented default is suitable.

Default
900
Range
100–9999
Required
No
Documented values9001009999

b variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison3 variations

b = 900

Uses 900 for labels per roll while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-b-1.zpl
^JHD,900,N,1,N,D,1,N,1000000,N

b = 100

Uses 100 for labels per roll while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-b-2.zpl
^JHD,100,N,1,N,D,1,N,1000000,N

b = 9999

Uses 9999 for labels per roll while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-b-3.zpl
^JHD,9999,N,1,N,D,1,N,1000000,N
c

Media replaced

Sets media replaced. It can be omitted when the documented default is suitable.

Default
N
Required
No
Documented valuesNY

c variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

c = Y

Uses Y for media replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-c-1.zpl
^JHD,900,Y,1,N,D,1,N,1000000,N

c = N

Uses N for media replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-c-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,N
d

Ribbon length

Sets ribbon length. It can be omitted when the documented default is suitable.

Default
1 - for 96XiIIIPlus 7 - for all other printers
Required
No
Documented values1N023456710111213141516

d variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison3 variations

d = N

Uses N for ribbon length while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-d-1.zpl
^JHD,900,N,N,N,D,1,N,1000000,N

d = 0

Uses 0 for ribbon length while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-d-2.zpl
^JHD,900,N,0,N,D,1,N,1000000,N

d = 16

Uses 16 for ribbon length while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-d-3.zpl
^JHD,900,N,16,N,D,1,N,1000000,N
e

Ribbon replaced

Sets ribbon replaced. It can be omitted when the documented default is suitable.

Default
N
Required
No
Documented valuesNY

e variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

e = Y

Uses Y for ribbon replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-e-1.zpl
^JHD,900,N,1,Y,D,1,N,1000000,N

e = N

Uses N for ribbon replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-e-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,N
f

Early warning maintenance

Sets early warning maintenance. It can be omitted when the documented default is suitable.

Default
D On G-Series printers, this parameter must be enabled for the ^MA driven system to work
Required
No
Documented valuesDE

f variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

f = E

Uses E for early warning maintenance while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-f-1.zpl
^JHD,900,N,1,N,E,1,N,1000000,N

f = D

Uses D for early warning maintenance while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-f-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,N
g

Head cleaning interval

Sets head cleaning interval. It can be omitted when the documented default is suitable.

Default
1 - for 96XiIIIPlus 7 - for all other printers
Required
No
Documented values1023456789101112131415+1 more

g variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison3 variations

g = 0

Uses 0 for head cleaning interval while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-g-1.zpl
^JHD,900,N,1,N,D,0,N,1000000,N

g = 1

Uses 1 for head cleaning interval while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-g-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,N

g = 16

Uses 16 for head cleaning interval while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-g-3.zpl
^JHD,900,N,1,N,D,16,N,1000000,N
h

Head clean

Sets head clean. It can be omitted when the documented default is suitable.

Default
N
Required
No
Documented valuesNY

h variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

h = N

Uses N for head clean while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-h-1.zpl
^JHD,900,N,1,N,D,1,N,1000000,N

h = Y

Uses Y for head clean while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-h-2.zpl
^JHD,900,N,1,N,D,1,Y,1000000,N
i

Head life threshold

Sets head life threshold. It can be omitted when the documented default is suitable.

Default
1000000
Required
No
Documented values1000000

i variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

i = 1000000

Uses 1000000 for head life threshold while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-i-1.zpl
^JHD,900,N,1,N,D,1,N,1000000,N

i = 1000001

Uses 1000001 for head life threshold while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-i-2.zpl
^JHD,900,N,1,N,D,1,N,1000001,N
j

Head replaced

Sets head replaced. It can be omitted when the documented default is suitable.

Default
N
Required
No
Documented valuesNY

j variations

Compare values side by side; other parameters remain at representative defaults.

Side-by-side comparison2 variations

j = N

Uses N for head replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-j-1.zpl
^JHD,900,N,1,N,D,1,N,1000000,N

j = Y

Uses Y for head replaced while the other command values stay at representative defaults.

Edit in editor
ZPLcaret-jh-j-2.zpl
^JHD,900,N,1,N,D,1,N,1000000,Y

Primary source

Official Zebra reference

Use the manufacturer reference for printer- and firmware-specific behavior beyond ZPLr’s pinned rendering profile.

Open Zebra documentation